Exhibit 97

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SKEENA RESOURCES LIMITED
CLAWBACK POLICY

The board of directors (the “Board”) of Skeena Resources Limited (the “Company”) has determined that it is appropriate for the Company to adopt this Clawback Policy (the “Policy”) to be applied to the Executive Officers of the Company effective as of the Effective Date, pursuant to Section 954 of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010.

For purposes of this Policy, the following definitions shall apply:

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Officer, the Controller) and any Vice Presidents of the Company (including Senior Vice Presidents) who are in charge of a principal business unit, division and any other individual who meets the definition of “executive officer” within the meaning of Rule 10D-1 under the Exchange Act, or who is designated from time to time by the Board as an “Executive Officer” for the purposes of this Policy. Executive officers of the Company’s parent(s) or subsidiaries are deemed executive officers of the Company if they perform significant policy-making functions for the Company. Both current and former Executive Officers are subject to the Policy in accordance with its terms.

(x) the date the Board, a committee of the Board, or the officer or officers of the Company authorized to take such action if Board action is not required, concludes, or reasonably should have concluded, that the Company is required to prepare a Restatement; or (y) the date a court, regulator or other legally authorized body directs the Company to prepare a Restatement. Recovery of any Erroneously Awarded Compensation under the Policy is not dependent on if or when the Restatement is actually filed.

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issued financial statements but that would result in a material misstatement if the error were corrected in the current period or left uncorrected in the current period (commonly referred to as a “little r” restatement), within the meaning of Exchange Act Rule 10D-1 and NYSE listing standard Section 303A.14. Changes to the Company’s financial statements that do not represent error corrections under the then-current relevant accounting standards will not constitute Restatements. Recovery of any Erroneously Awarded Compensation under the Policy is not dependent on fraud or misconduct by any person in connection with the Restatement.

In the event of a Restatement, any Erroneously Awarded Compensation received during the Lookback Period prior to the Restatement: (a) that is then-outstanding but has not yet been paid shall be automatically and immediately forfeited; and (b) that has been paid to any person shall be subject to reasonably prompt repayment to the Company Group in accordance with Section 3 of this Policy. The Committee must pursue (and shall not have the discretion to waive) the forfeiture and/or repayment of such Erroneously Awarded Compensation in accordance with Section 3 of this Policy, except as provided below.

Notwithstanding the foregoing, the Committee (or, if the Committee is not composed entirely of independent directors, a majority of the independent directors serving on the Board) may determine not to pursue the forfeiture and/or recovery of Erroneously Awarded Compensation from any person if the Committee determines that such forfeiture and/or recovery would be impracticable due to any of the following circumstances: (i) the direct expense paid to a third party (for example, reasonable legal expenses and consulting fees) to assist in enforcing the Policy would exceed the amount to be recovered, including the costs that could be incurred if pursuing such recovery would violate local laws other than the Company’s Home Country laws (following reasonable attempts by the Company Group to recover such Erroneously Awarded Compensation, the documentation of such attempts, and the provision of such documentation to the NYSE); (ii) pursuing such recovery would violate the Company’s Home Country laws adopted prior to November 28, 2022 (provided that the Company obtains an opinion of Home Country counsel acceptable to the NYSE that recovery would result in such a violation and provides such opinion to the NYSE); or (iii) recovery would likely cause any otherwise tax- qualified retirement plan, under which benefits are broadly available to employees of Company Group, to fail to meet the requirements of 26 U.S.C. 401(a)(13) or 26 U.S.C. 411(a) and regulations thereunder.

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In the event that the Committee determines that any person shall repay any Erroneously Awarded Compensation, the Committee shall provide written notice to such person by email or certified mail to the physical address on file with the Company Group for such person, and the person shall satisfy such repayment in a manner and on such terms as required by the Committee, and the Company Group shall be entitled to set off the repayment amount against any amount owed to the person by the Company Group, to require the forfeiture of any award granted by the Company Group to the person, or to take any and all necessary actions to reasonably promptly recoup the repayment amount from the person, in each case, to the fullest extent permitted under applicable law, including without limitation, Section 409A of the Internal Revenue Code and the regulations and guidance thereunder. If the Committee does not specify a repayment timing in the written notice described above, the applicable person shall be required to repay the Erroneously Awarded Compensation to the Company Group by wire, cash or cashier’s check no later than thirty (30) days after receipt of such notice.

No person shall be indemnified, insured or reimbursed by the Company Group in respect of any loss of compensation by such person in accordance with this Policy, nor shall any person receive any advancement of expenses for disputes related to any loss of compensation by such person in accordance with this Policy, and no person shall be paid or reimbursed by the Company Group for any premiums paid by such person for any third- party insurance policy covering potential recovery obligations under this Policy. For this purpose, “indemnification” includes any modification to current compensation arrangements or other means that would amount to de facto indemnification (for example, providing the person a new cash award which would be cancelled to effect the recovery of any Erroneously Awarded Compensation). In no event shall the Company Group be required to award any person an additional payment if any Restatement would result in a higher incentive compensation payment.

This Policy generally will be administered and interpreted by the Committee. Any determination by the Committee with respect to this Policy shall be final, conclusive and binding on all interested parties. Any discretionary determinations of the Committee under this Policy, if any, need not be uniform with respect to all persons, and may be made selectively amongst persons, whether or not such persons are similarly situated, provided that all such determinations shall be made reasonably and in good faith. In the event of a disagreement between the parties, the Executive Officer may appeal the Committee’s decision to an independent arbitrator, with such costs borne ¾ by the Company and ¼ by the Executive Officer.

This Policy is intended to satisfy the requirements of Section 954 of the Dodd-Frank Wall Street Reform and Consumer Protection Act, as it may be amended from time to time, and any related rules or regulations promulgated by the SEC or the NYSE, including any additional or new requirements that become effective after the Effective Date which upon effectiveness shall be deemed to automatically amend this Policy to the extent necessary to comply with such additional or new requirements.

The provisions in this Policy are intended to be applied to the fullest extent of the law. To the extent that any provision of this Policy is found to be unenforceable or invalid under any applicable law, such provision will be applied to the maximum extent permitted and shall automatically be deemed amended in a manner consistent with its objectives to the extent necessary to conform to applicable law.

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The invalidity or unenforceability of any provision of this Policy shall not affect the validity or enforceability of any other provision of this Policy. Recoupment of Erroneously Awarded Compensation under this Policy is not dependent upon the Company Group satisfying any conditions in this Policy, including any requirement to provide applicable documentation to the NYSE.

The rights of the Company Group under this Policy to seek forfeiture or reimbursement are in addition to, and not in lieu of, any rights of recoupment, or remedies or rights other than recoupment, that may be available to the Company Group pursuant to the terms of any law, government regulation or stock exchange listing requirement or any other policy, code of conduct, employee handbook, employment agreement, equity award agreement, or other plan or agreement of the Company Group.

To the extent permitted by, and in a manner consistent with applicable law, including SEC and NYSE rules, the Committee may terminate, suspend or amend this Policy at any time in its discretion.

This Policy shall be binding and enforceable against all persons and their respective beneficiaries, heirs, executors, administrators or other legal representatives with respect to any Covered Compensation granted, vested or paid to or administered by such persons or entities.

Adopted and approved by the Board on May 15, 2023.

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SKEENA RESOURCES LIMITED

CLAWBACK POLICY

ACKNOWLEDGMENT, CONSENT AND AGREEMENT

I acknowledge that I have received and reviewed a copy of the Skeena Resources Limited Clawback Policy (as may be amended from time to time, the “Policy”) and I have been given an opportunity to ask questions about the Policy and review it with my counsel. I knowingly, voluntarily and irrevocably consent to and agree to be bound by and subject to the Policy’s terms and conditions, including that I will return any Erroneously Awarded Compensation that is required to be repaid in accordance with the Policy.

I further acknowledge, understand and agree that: (a) the compensation that I receive, have received or may become entitled to receive from the Company Group is subject to the Policy, and the Policy may affect such compensation; and (b) I have no right to indemnification, insurance payments or other reimbursement by or from the Company Group for any compensation that is subject to recoupment and / or forfeiture under the Policy. Capitalized terms not defined herein have the meanings set forth in the Policy.

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Exhibit 99.1

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ANNUAL INFORMATION FORM

For the fiscal year ended December 31, 2024

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DATED: March 31, 2025

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TABLE OF CONTENTS

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GLOSSARY OFTERMS

The following is a glossary of terms used in this Annual Information Form.

“2023 FS” has the meaning given under the section titled “Mineral Projects – Mineral Processing and Metallurgical Testing – 2023 Feasibility Study Program”;

“AACE International” has the meaning given under the section titled “Mineral Projects – Capital and Operating Costs”;

“Additional Term” has the meaning given under the section titled “Description of the Business – Economic Dependence – Gold Stream Arrangement”;

“ALS Vancouver” has the meaning given under the section titled “Mineral Projects – Sampling, Analysis and Data Verification”;

“Annual Information Form” or “AIF” means this annual information form of the Company dated March 31, 2025 for the year ended December 31, 2024;

“AuEq” means gold equivalent;

“Audit Committee” means the audit committee of the Company consisting of Ms. Suki Gill (Chair), Mr. Greg Beard, and Ms. Nathalie Sajous;

“Barrick” means Barrick Gold Inc., a wholly-owned subsidiary of Barrick Gold Corporation;

“BCRMA” has the meaning given under the section titled “Description of the Business – Social or Environmental Policies”;

“Board of Directors” means the board of directors of the Company;

“British Columbia”, “BC” or “B.C.” means British Columbia, Canada;

“2014 CIM Definition Standards” means the Canadian Institute of Mining, Metallurgy and Petroleum Definition Standards for Mineral Resources and Mineral Reserves (May 2014);

“Common Shares” means the common shares in the capital of the Company;

“Company”, “Skeena”, “our”, “us” or “we” means Skeena Resources Limited;

“Contact Mudstone” has the meaning given under the section titled “Mineral Projects – Geological Setting and Mineralization”;

“Deposit” has the meaning given under the section titled “Description of the Business – Economic Dependence – Gold Stream Arrangement”;

“DRIPA” has the meaning given under the section titled “Risk Factors – Indigenous Rights and UNDRIP”;

“DSU” deferred share unit of the Company issued pursuant to the Omnibus Plan;

“EDGAR” means the U.S. Securities and Exchange Commission’s Electronic Data Gathering, Analysis, and Retrieval system available at www.sec.gov;

“EM” has the meaning given under the section titled “Mineral Projects – History”;

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“Eskay”, “Eskay Creek”, “Eskay Creek Project” or “Eskay Creek Revitalization Project” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background”;

“Financial Statements” means the annual consolidated financial statements for the Company for the years ended December 31, 2024 and 2023;

“Forward-Looking Statements” has the meaning given under the section titled “Forward-Looking Statements”;

“Franco-Nevada” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background – 2021”;

“2021 Franco-Nevada Agreement” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background”;

“2023 Franco-Nevada Agreement” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background – 2023”;

“Golden Triangle” means the mineral region in northwest British Columbia;

“Gold Stream Arrangement” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background – 2024”;

“HIGmill” has the meaning given under the section titled “Mineral Projects – Mineral Processing and Metallurgical Testing – 2022 Feasibility Study Program”;

“HW” has the meaning given under the section titled “Mineral Projects – Geological Setting and Mineralization”;

“ID2”has the meaning given under the section titled “Mineral Projects – Mineral Resource Estimates”;

“Initial Term” has the meaning given under the section titled “Description of the Business – Economic Dependence – Gold Stream Arrangement”;

“IRR” has the meaning given under the section titled “Mineral Projects – Eskay Creek Project – Economic Analysis – Methodology Used”;

“IsaMILL” has the meaning given under the section titled “Mineral Projects – Mineral Processing and Metallurgical Testing – 2022 Feasibility Study Program”;

“LiDAR” has the meaning given under the section titled “Mineral Projects – History”;

“LOM” has the meaning given under the section titled “Mineral Projects – Mineral Processing and Metallurgical Testing”;

“LP” has the meaning given under the section titled “Mineral Projects – Geological Setting and Mineralization”;

“Maverix” has the meaning given under the section titled “Mineral Projects – Mineral Tenure, Surface Rights, Water Rights, Royalties and Agreements”;

“MD&A” means the Company’s management discussion and analysis for the year ended December 31, 2024;

“MRSA” has the meaning given under the section titled “Mineral Projects – Mining Operations – Mine Plan”;

“NAG” has the meaning given under the section titled “Mineral Projects – Mining Operations – Mine Plan”;

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“Newmont Transaction” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background – 2022”;

“NEX” has the meaning given under the section titled “Mineral Projects – Geological Setting and Mineralization”;

“NI 43-101” means National Instrument 43-101 – Standards of Disclosure for Mineral Projects within Canada;

“NPV” means net present value;

“NSR” means net smelter return;

“NYSE” means the New York Stock Exchange;

“OK” has the meaning given under the section titled “Mineral Projects – Mineral Resource Estimates”;

“Omnibus Plan” has the meaning given under the section titled “Description of Share Capital”;

“Options” means incentive stock options to purchase Common Shares;

“Orion” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background – 2024”;

“PAG” means potentially acid generating;

“Project Financing Package” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background – 2024”;

“PSU” means performance share units of the Company issued pursuant to the Omnibus Plan;

“QA/QC” has the meaning given under the section titled “Mineral Projects – Sampling, Analysis and Data Verification”;

“Qualified Person” or “QP” has the meaning given under the section titled “Annual Information Form”;

“QuestEx Transaction” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background – 2022”;

“ROM” has the meaning given under the section titled “Mineral Projects – Processing and Recovery Operations”;

“RSU” means restricted shares units of the Company which are subject to the conditional vesting grant of Common Shares awarded to certain employees of the Company;

“SAG” has the meaning given under the section titled “Mineral Projects – Processing and Recovery Operations”;

“SEC” means the U.S. Securities and Exchange Commission;

“SEDAR+” means the System for Electronic Document Analysis and Retrieval filing system, available at http://www.sedarplus.com;

“Senior Secured Term Loan” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background – 2024”;

“SG” has the meaning given under the section titled “Mineral Projects – Mineral Resource Estimates”;

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“SGS” has the meaning given under the section titled “Mineral Projects – Sampling, Analysis and Data Verification”;

“Share Units” means the RSUs, PSUs and DSUs, collectively;

“Snip” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background”;

“Snip Project” means the past-producing Snip project located in the Golden Triangle region of northwest, British Columbia;

“SRMs” has the meaning given under the section titled “Mineral Projects – Sampling, Analysis and Data Verification”;

“Stream Percentage” has the meaning given under the section titled “Description of the Business – Economic Dependence – Gold Stream Arrangement”;

“TCG” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background”;

“Technical Report” means NI 43-101 Technical Report on Updated Feasibility Study relating to the Eskay Creek Project dated November 14, 2023;

“TMSF” has the meaning given under the section titled “Mineral Projects – Mineral Tenure, Surface Rights, Water Rights, Royalties and Agreements”;

“TSX” means the Toronto Stock Exchange;

“UNDRIP” has the meaning given under the section titled “Risk Factors – Indigenous Rights and UNDRIP”;

“Units” has the meaning given under the section titled “General Development of the Business – Three Year History – Overview & Background”;

“U.S. Borax” has the meaning given under the section titled “Mineral Projects – History”;

“U.S. Exchange Act” has the meaning given under the section titled “Risk Factors – Foreign Private Issuer Disclosure Requirements”;

“VLF” has the meaning given under the section titled “Mineral Projects – History”;

“VMS” has the meaning given under the section titled “Mineral Projects – Geological Setting and Mineralization”;

“Warrants” means warrants to purchase Common Share of the Company; and

“WT” has the meaning given under the section titled “Mineral Projects – Geological Setting and Mineralization”.

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ANNUAL INFORMATIONFORM

In this Annual Information Form, unless otherwise noted or the context indicates otherwise, the “Company”, “Skeena”, “we”, “us”, and “our” refer to Skeena Resources Limited.

Reference is made in this Annual Information Form to the Financial Statements and the MD&A of Skeena. The Financial Statements and MD&A are available for review under the Company’s SEDAR+ profile at www.sedarplus.com and in the United States on EDGAR at www.sec.gov. All financial information in this Annual Information Form is prepared in Canadian dollars and using International Financial Reporting Standards as issued by the International Accounting Standards Board. The information contained herein is dated as of December 31, 2024 unless otherwise stated.

Information of a technical and scientific nature that forms the basis of the disclosure in this AIF has been reviewed and approved by Paul Geddes, P.Geo, Senior Vice-President of Exploration and Resource Development of the Company, who is a “Qualified Person” as defined by NI 43-101.

All currency amounts in this Annual Information Form are expressed in Canadian dollars unless otherwise indicated.

FORWARD-LOOKINGSTATEMENTS

This Annual Information Form contains certain information that may constitute “forward-looking information” and “forward-looking statements” under Canadian and U.S. securities laws (together, “forward-looking statements”) which are based upon the Company’s current internal expectations, estimates, projections, assumptions, and beliefs. Generally, forward-looking statements can be identified by the use of forward-looking terminology such as “plans”, “expects” or “does not expect”, “is expected”, “budget” or “budgeted”, “scheduled”, “estimates”, “projects”, “intends”, “proposes”, “complete”, “anticipates” or “does not anticipate”, “believes”, “likely”, “may”, “will”, “should”, “intend”, “anticipate”, “proposed”, “potential”, or variations of such words and phrases or statements that certain actions, events, conditions or results “may”, “can”, “could”, “would”, “might”, “will be taken”, “occur”, “continue”, or “be achieved” or similar words and expressions or the negative and grammatical variations thereof or by discussions of strategy.

Forward-looking statements include, but are not limited to estimates, plans, expectations, opinions, forecasts, projections, priorities, strategies, targets, guidance, or other statements that are not statements of historical fact. Forward-looking statements are subject to known and unknown risks, uncertainties, and other factors that may cause the actual results, level of activity, performance, or achievements of the Company to be materially different from those expressed or implied by such forward-looking statements. The forward-looking statements included in this Annual Information Form are made only as of the date of this Annual Information Form. Forward-looking statements in this Annual Information Form include, but are not limited to, statements with respect to:

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With respect to the forward-looking statements contained in this AIF, we have made assumptions regarding, among other things: (i) our ability to generate cash flow from operations and obtain necessary financing on acceptable terms; (ii) general economic, financial market, regulatory, and political conditions in which we operate; (iii) existence of a basic level of public-support for mine development from the local community; (iv) competition; (v) anticipated and unanticipated costs; (vi) government and Tahltan Nation regulation of our activities and production and in the areas of taxation and environmental protection; (vii) the timely receipt of any required regulatory approvals; (viii) our ability to obtain qualified staff, equipment, and services in a timely and cost efficient manner; (ix) our ability to conduct operations in a safe, efficient, and effective manner; (x) the ability to obtain or maintain permits, mineability and marketability, exchange and interest rate assumptions, including, without limitation, being approximately consistent with the assumptions in the Technical Report; (xi) the results of exploration; (xii) the accuracy of geological and engineering assumptions; (xiii) the likelihood of future operational difficulties (including cost escalation, unavailability of materials and equipment, industrial disturbances or other job action and possible events related to health, safety and environmental matters); (xiv) the availability of certain consumables and services and the prices for power and other key supplies, including, without limitation, being approximately consistent with assumptions in the Technical Report; (xv) assumptions underlying mineral reserve and mineral resource estimates; (xvi) assumptions made in the Technical Report economic assessment estimates, including, but not limited to, geological interpretation, grades, metal price assumptions, metallurgical and mining recovery rates, geotechnical and hydrogeological assumptions, capital and operating cost estimates, and general marketing, political, business and economic conditions, as applicable; (xvii) ability to develop infrastructure; (xviii) assumptions made in the interpretation of drill results, geology, grade and continuity of mineral deposits, expectations regarding access and demand for equipment, skilled labour and services needed for exploration and development of mineral properties; (xix) the likelihood of social unrest; (xx) the likelihood of the failure of counterparties to perform their contractual obligations; (xxi) changes in priorities, plans, strategies and prospects; (xxii) general economic, industry, business and market conditions; (xxiii) disruptions or changes in the credit or securities markets; (xxiv) changes in law, regulation, or application and interpretation of the same; (xxv) the ability to implement business plans and strategies, and to pursue business opportunities; (xxvi) rulings by courts or arbitrators, proceedings and investigations; (xxvii) the future impacts of tariffs and other trade protectionism measures; (xxviii) the future impacts of pandemics, or other future significant new diseases; (xxix) the expected results of acquisitions on our operations; (xxx) the ability of the Company to secure a suitable agreement with a smelter or buyer for its concentrate; (xxxi) mining dilution and ability to mine in areas previously exploited using underground mining methods as envisaged;

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(xxxii) commodity prices and exchange rates; (xxxiii) the availability of electric power; and (xxxiv) various other events, conditions or circumstances that could disrupt Skeena’s priorities, plans, strategies and prospects.

Certain of the forward-looking statements and forward-looking information and other information contained herein concerning the mining industry and the general expectations of Skeena concerning the mining industry are based on estimates prepared by Skeena using data from publicly available governmental sources, market research, industry analysis, and on assumptions based on data and knowledge of the mining industry, which Skeena believes to be reasonable. However, although generally indicative of relative market positions, market shares, and performance characteristics, such data is inherently imprecise, is subject to interpretation and cannot be verified with complete certainty. Skeena has not independently verified any third-party information. While Skeena is not aware of any misstatement regarding any industry or government data presented herein, the mining industry involves risks and uncertainties that are subject to change based on various factors.

Forward-looking statements are based on certain assumptions and analyses made by the Company in light of the experience and perception of historical trends, current conditions and expected future developments and other factors it believes are appropriate, but which are subject to risks and uncertainties. Although we believe that the assumptions underlying these statements are reasonable, they may prove to be incorrect, and we cannot assure that actual results will be consistent with these forward-looking statements. Given these risks, uncertainties, and assumptions, readers should not place undue reliance on these forward-looking statements. The Company’s forward-looking statements are expressly qualified in their entirety by this cautionary statement.

In particular, but without limiting the foregoing, disclosure in this Annual Information Form under “Description of the Business” as well as statements regarding the Company’s objectives, plans, and goals, including future operating results, economic performance, and planned exploration, development and production activities may make reference to or involve forward-looking statements. A number of factors could cause actual events, performance, or results to differ materially from what is projected in the forward-looking statements.

Whether actual performance or achievements will conform to the Company’s expectations and predictions is subject to a number of known and unknown risks, uncertainties, assumptions and other factors, including those listed under “Risk Factors” in this AIF. The purpose of forward-looking statements is to provide the reader with a description of management’s expectations, and such forward-looking statements may not be appropriate for any other purpose. The Company undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by applicable law. Additional information on these and other factors which could affect the Company’s operations and financial results are discussed in the sections relating to risk factors of our business filed in the Company’s filings with applicable securities commissions or other securities regulatory authorities and which may be accessed through the SEDAR+ website at www.sedarplus.com and EDGAR at www.sec.gov.

CORPORATESTRUCTURE

Name, Address, and Incorporation

Skeena was incorporated as Progress Petroleum Ltd. on September 13, 1979 in accordance with the Company Act (British Columbia). The Company changed its name to Prolific Petroleum Ltd. on October 24, 1979, then to Prolific Resources Ltd. on June 8, 1987 and finally, to Skeena Resources Limited on June 4, 1990. In 2006, the Company transitioned from the Company Act (British Columbia) to the Business Corporations Act (British Columbia).

The head and registered office of the Company is located at 2600–1133 Melville St, Vancouver, British Columbia, V6E 4E5.

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GENERAL DEVELOPMENT OF THEBUSINESS

Three Year History

Overview & Background

Skeena is a leading precious metals developer that is focused on advancing the Eskay Creek Gold-Silver Project – a past producing mine located in the renowned Golden Triangle in British Columbia, Canada. Skeena is committed to sustainable mining practices and maximizing the potential of its mineral resources. In partnership with the Tahltan First Nation, Skeena strives to foster positive relationships with Indigenous communities while delivering long-term value and sustainable growth for its stakeholders.

On July 31, 2017, Skeena acquired the Snip Project from Barrick. The Snip Project consists of the past producing Snip mine, including one mining lease and nine mineral tenures totaling approximately 4,724 hectares in the Liard Mining Division. The Snip mine produced approximately 1.1 million ounces of gold from 1991 until 1999 at an average gold grade of 27.5 g/t.

On October 2, 2020, Skeena acquired the Eskay Creek Project from Barrick. The Eskay Creek Project consists of eight mineral leases, two surface leases and several unpatented mining claims, which total 7,666 hectares. In addition, the Eskay Creek Project has excellent infrastructure, including all‐weather road access and proximity to the new 287‐kV Northwest Transmission Line.

On July 6, 2020, Skeena announced that it had signed a binding term sheet with Barrick, setting out the revised terms pursuant to which Skeena would exercise its option to acquire 100% of the Eskay Creek Project. Further, it announced that Barrick had agreed to waive its back-in right on the Eskay Creek Project. Upon completion of the transaction and execution of the definitive agreements associated therewith, Barrick became a significant shareholder in Skeena. Skeena acquired a 100% ownership interest in the Eskay Creek Project in consideration for:

On April 8, 2021, Skeena announced that a new conservancy to protect the environmental and wildlife of Tahltan territory had been created in an area of northwest BC known as the Ice Mountain Lands, also known as the Spectrum property. Skeena returned its mineral tenures on the Spectrum property, enabling the Tahltan Central Government (“TCG”), Skeena, the Nature Conservancy of Canada and BC Parks Foundation to collaborate and create this conservancy.

On June 10, 2021, the Company consolidated its issued and outstanding Common Shares on a 4 old for 1 new basis. All Common Share figures and information within this AIF reflect the share consolidation.

On December 23, 2021, Skeena closed a non-brokered private placement whereby Franco-Nevada Corporation (“Franco-Nevada”) purchased 1,471,739 Common Shares. Concurrent with the closing of the offering, Skeena entered into a definitive agreement that granted to Franco-Nevada a right of first refusal over the sale of a 0.5% NSR over the Eskay Creek Project (the “2021 Franco-Nevada Agreement”).

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2022

QuestEx was an exploration company with mineral properties located in the Golden Triangle and Toodoggone area of British Columbia and its exploration projects included KSP, Kingpin, Sofia, Heart Peaks, Castle, Moat, Coyote, and North ROK. On June 1, 2022, the Company acquired all of the issued and outstanding common shares of QuestEx, pursuant to a court approved plan of arrangement for $0.65 cash and 0.0367 of a Skeena common share for each QuestEx common share outstanding at closing. Skeena replacement options and warrants were also issued to the holders of QuestEx options and warrants (the “QuestEx Transaction”).

Immediately following the QuestEx Transaction, on June 1, 2022, Skeena sold certain QuestEx properties, including Heart Peaks, Castle, Moat, Coyote, and North ROK properties, and related assets, to an affiliate of Newmont Corporation via an asset purchase agreement for total consideration of $25.6 million (the “Newmont Transaction”).

These transactions added over 74,000 hectares to Skeena’s land holdings. The KSP and Kingpin properties are proximal to Skeena’s Eskay Creek and Snip projects and appear to have the same geological hallmarks that have hosted other large gold systems in the area. Involving Newmont on these transactions has allowed Skeena to acquire these strategically important land packages while minimizing share dilution.

On September 8, 2022, the Company announced the results of a feasibility study (“FS”) for the Eskay Creek Project.

On September 23, 2022, the Company closed a bought deal public offering. The Company issued 5,702,479 Common Shares, including 743,801 Common Shares issued in connection with the exercise in full of the over-allotment option granted to the syndicate of underwriters led by Raymond James Ltd., at a price of $6.05 per Common Share for gross proceeds of approximately $34.5 million.

On September 23, 2022, the Company repurchased the 0.5% NSR royalty held by Barrick on the Eskay Creek Project, at a cost of $17.5 million. This royalty was reduced to a 0.5% NSR royalty as a result of this transaction.

On December 30, 2022, the Company closed a royalty sale with Franco-Nevada pursuant to which the Company granted a 0.5% NSR on the Eskay Creek Project, for a payment of $27 million from Franco-Nevada at closing and contingent cash consideration of $1.5 million.

2023

On January 11, 2023, the Company announced that its Chief Operating Officer, Shane Williams, had left the Company to pursue other endeavours. Randy Reichert, President & Chief Executive Officer, was appointed to assume the duties of Chief Operating Officer in addition to his normal role.

On May 24, 2023, the Company closed a bought deal offering. The Company issued 1,305,000 Common Shares, including 300,000 Common Shares issued in connection with the exercise in full of the over-allotment option granted to the syndicate of underwriters led by BMO Capital Markets, at a price of $7.35 per Common Share for gross proceeds of approximately $73.5 million.

On November 14, 2023, the Company announced the results of a Definitive Feasibility Study for the Eskay Creek Project, which was ultimately published on December 22, 2023. See “Mineral Projects – Eskay Creek Project – Technical Report” for more information.

On December 18, 2023, the Company completed a financing package of $81 million with Franco-Nevada consisting of (i) a private placement financing of $25 million aggregate principal amount of convertible unsecured debenture of Skeena, and (ii) the sale of a 1.0% net smelter return royalty on Eskay Creek for $56 million (the “2023 Franco-Nevada Agreement”).

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2024

On June 25, 2024, the Company announced that it had secured a financing package with Orion Resource Partners (“Orion”) for the development, construction, and general working capital required to advance the Eskay Creek Project (the “Project Financing Package”). The Project Financing Package was comprised of:

2025

On January 27, 2025, the Company announced a strategic investment into TDG Gold Corp. to advance the Greater Shasta-Newberry project in the Toodoggone District, in British Columbia, Canada. The Company agreed to purchase 22,000,000 common shares of TDG Gold Corp. in exchange for the sale of the Company’s Sofia property to TDG Gold Corp, and payment of $7,000,000.

On February 26, 2025, the Company closed a bought deal offering of 3,290,000 Common Shares at $14.70, and 2,230,000 Flow-Through Common Shares at $17.93, for aggregate gross proceeds of $88,346,900.

DESCRIPTION OF THEBUSINESS

A. General

The principal business of Skeena is the exploration and development of mineral properties in the Golden Triangle region of northwest British Columbia, Canada. The Company’s flagship property is the Eskay Creek Project which entered the development phase during December 2024.

The Company also owns several exploration stage mineral properties in the Golden Triangle and Liard Mining Division of British Columbia, including the past-producing Snip gold mine.

Skeena is currently focused on developing the Eskay Creek Project, which is approximately 83 km northwest of Stewart, British Columbia, and is located in close proximity to excellent infrastructure.

Skeena is in the process of evaluating its exploration-stage properties through exploration programs. The objective of such programs is to evaluate the potential of the subject property to host economic concentrations of minerals and to determine if additional exploration or development spending is warranted. In such case, an appropriate program to advance the property to the next decision point will be formulated, and depending on available funds, implemented if desirable. If Skeena does not wish to advance the property further, such property may be offered for sale or joint venture.

Specialized Skill and Knowledge

The Company’s business requires specialized skills and knowledge. Such skills and knowledge include the areas of mining, environmental permitting, engineering, geology, drilling, metallurgy, construction, community engagement, Indigenous Nation relations and negotiation, logistical planning, project management and implementation of exploration and development programs as well as legal compliance, finance and accounting. The Company competes with numerous other companies for the recruitment and retention of qualified employees and consultants in such fields. See “Risk Factors – Dependence on Skilled Labour” for more information.

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Competitive Conditions

The gold exploration and mineral development business is competitive. The Company competes with numerous other companies and individuals that have resources significantly in excess of those of the Company, in the search for and the acquisition of mineral properties. The ability of the Company to acquire mineral properties in the future will depend not only on its ability to develop its present properties, but also on its ability to select and acquire suitable producing properties or prospects for development or mineral exploration.

Cycles

The mining business is subject to global economic cycles which affect the marketability of products derived from mining.

Employees

As of the date of this Annual Information Form, the Company has approximately 83 full-time permanent employees in Canada. In addition, it retains a number of geologists, engineers, employees and other consultants on a temporary contract basis, as required. To continue with the development of its assets, the Company is likely to require additional experienced employees and third-party consultants and contractors. The Company has not experienced, and does not expect to experience, significant difficulty in attracting and retaining qualified personnel. However, no assurance can be given that a sufficient number of qualified employees will be retained by the Company when necessary. In addition, relations between the Company and its employees and contractors may be affected by changes in labour and employment laws. Changes in such legislation or in the relationship between the Company and its employees and contractors may have a material adverse effect on the Company’s business, results of operations, financial condition or prospects. See “Risk Factors – Dependence on Skilled Labour” for more information.

Environmental Protection

The mining industry is subject to environmental regulations pursuant to applicable legislation. Such legislation provides for restrictions and prohibitions on release or emission of various substances produced in association with certain mining industry operations, in addition to environmental monitoring, reporting, and reclamation.

Social or Environmental Policies

The Board of Directors has established the following principles to guide the Company and its management, workers and contractors in responsible exploration and governance practices:

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One of Skeena’s founding principles is to work closely with Indigenous Groups and communities to develop consent for project operations, achieve the responsible development of its projects, and to make a positive difference in the places that the Company operates. Skeena believes in building and sustaining mutually beneficial and supportive relationships with Indigenous Groups and communities by creating a foundation of trust and respect, through open, honest and timely communication.

Skeena has established Communications and Exploration Agreements with the Tahltan Central Government. The Communications Agreement provides a protocol and framework for communication activities with the Tahltan Nation, establishing a system and schedule for ongoing community engagement, and discussions with community leadership.

The Exploration Agreement addresses employment and contracting opportunities, permit application reviews, environmental monitoring, protection of cultural resources, and capacity funding support to the Tahltan Central Government related to Skeena’s exploration work in Tahltan traditional territory. Collectively, these agreements support the ongoing development of the strong collaborative relationship between Skeena and the Tahltan Nation.

The Eskay Creek Project has a long‐standing history of providing benefits to the Tahltan Nation. Previous operators maintained agreements with the Tahltan Nation which included provisions for training, employment, and contracting opportunities. The Company has been working in the Tahltan territory since 2016 and has developed a strong working relationship with the Tahltan Nation. Skeena participates in the British Columbia Regional Mining Alliance (“BCRMA”) which is a partnership between Indigenous groups, the British Columbia Government, Association for Mineral Exploration British Columbia and exploration companies operating in the Golden Triangle region of British Columbia. The BCRMA provides a platform for all parties to collaborate in communications with the potential investment partners on opportunities in the region.

Project Finance

The Gold Stream Arrangement and Senior Secured Term Loan contain certain key terms, as set out in the sections below.

Gold Stream Arrangement

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first, second or third calendar quarters following September 30, 2027, respectively, and to 11.40% for the remaining calendar quarters until satisfaction of the completion test;

Senior Secured Term Loan

1   The Security Release Date is the later of: (a) Orion yielding an imputed 13% IRR on the Deposit; and (b) the earlier of the date on which (i) the Senior Secured Term Loan is repaid in full or (ii) Orion is no longer the lender under the Senior Secured Term Loan.

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RISKFACTORS

There are a number of risk factors that could cause future results to differ materially from those described herein. The risks and uncertainties described herein are not the only ones the Company faces. Additional risks and uncertainties, including those that the Company does not currently know about, or that it currently considers immaterial, may also adversely affect the Company’s business. If any of the following risks materialize, the Company’s business may be harmed, and its financial condition and operational results may suffer significantly. Existing and prospective investors should carefully consider the risk factors set out below and consider all other information contained in this Annual Information Form and in the Company’s other public filings before making an investment decision. The information in this section is intended to serve as an overview and should not be considered comprehensive, as the Company may face risks and uncertainties that are not currently known to us, or that we currently deem to be immaterial, and that are therefore not discussed in this section. All risks to the Company’s business have the potential to influence its operations in a materially adverse manner.

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Development and Operational Risk

Mining development projects and mining operations generally involve a high degree of risk which could adversely impact our success and financial performance. Development projects typically require significant expenditures before production is possible. Actual capital or operating costs may be materially different from estimated capital or operating costs. Development projects can also experience unexpected delays and problems during permitting, construction and development, during mine start-up or during production. The construction and development of a mining project is also subject to many other risks, including, without limitation, risks relating to:

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Our operations are also subject to all of the hazards and risks normally encountered in the exploration and development of mineral projects and properties, including unusual and unexpected geologic formations, seismic activity, rock slides, ground instabilities or failures, mechanical failures, flooding and other conditions involved in the drilling and removal of material, any of which could result in damage to, or destruction of facilities, damage to life or property, environmental damage and possible liability.

Most of the above factors are beyond the control of the Company. The exact effect of these factors cannot be accurately predicted, but any one of these factors or a combination thereof may have an adverse effect on the Company’s business.

Construction and Start-up of Mining and Milling Operations

In recent years in Canada, it has become increasingly challenging to build a mine. Before having a prospect of profitable operations, the Company’s current business plan involves obtaining a positive construction decision from the Board of Directors, successful construction of a mill and the start of mining and milling operations. The capital expenditures and time required to develop a new mine are considerable and changes in cost or construction schedules can significantly increase both the time and capital required to build the Eskay Creek Project.

Construction costs and timelines can be impacted by a wide variety of factors, many of which are beyond the control of the Company. These include, but are not limited to, inflation, weather conditions, ground conditions, availability of appropriate rock and other material required for construction, availability and performance of employees, contractors and suppliers, supply chain constraints, shipping risks and delays, delivery and installation of equipment, design changes, accuracy of construction quantities and cost estimates and social acceptance by communities.

Many permits and authorizations must be obtained in order to successfully execute this plan, and each permit or authorization may not be granted on a timely basis, or may not be granted at all. Obtaining permits may become more onerous as a result of changes to political parties in power at the federal, provincial and local level, including changes within Indigenous leadership. Certain non-governmental organizations actively seek to delay the granting of mining permits, or challenge them after they have been granted. In addition, there is an increasing sensitivity to the handling and storage of mine waste tailings. The Company is committed to actively engaging with and consulting relevant Indigenous groups, some of whom may not be supportive of mining development in their traditional territory, and who may seek to temporarily delay or permanently prevent the development of the mine. Delays in construction resulting from the factors described above or otherwise typically cause costs to increase.

The start-up and integration of all of the systems in a mill facility is a complicated undertaking. In addition, models of mineralization may not be accurate. Metallurgy can also vary throughout the ore body causing challenges in extracting and concentrating sufficient metal, especially during the start-up period. Delays in achieving commercial production during the start-up period may result in delayed revenues.

Because the Company does not have positive operating cash flow, where revenue delays or cost overruns are significant, the Company may be forced to raise additional capital in order to achieve commercial production. Financial markets typically adjust a company’s valuation downward when a company is forced to raise additional capital during construction in order to achieve commercial production. In extreme cases, the Company may be unable to raise additional capital which may result in equity becoming valueless and the loss of an investor’s entire investment.

Nature of Mineral Exploration

Producing mines consume their resources as they produce. In addition, in order to maximize a project’s net present value, the most valuable ore will be prioritized over the least valuable ore.

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As a result, production from most mines will typically decline over the life of the mine. The Company’s ability to increase its annual production and generate revenues therefrom will depend significantly upon the Company’s ability to discover or acquire new deposits, to successfully bring new mines into production, and to expand reserves at existing mines. The exploration for and development of mineral deposits involves significant financial risks which even a combination of careful evaluation, experience and knowledge may not eliminate. While the discovery of a body of mineralization may result in substantial rewards, few properties which are explored are ultimately developed into producing mines. Major expenses may be required to establish mineral reserves, to develop metallurgical processes and to construct mining and processing facilities at a site. As a result, the Company cannot provide assurance that its exploration or development efforts will result in any new commercial mining operations nor that they will yield new mineral reserves.

There is no assurance that the Company’s exploration and development programs and properties will result in the discovery, development or production of a commercially viable ore body or yield new reserves to replace or expand current reserves. The exploration for and development of mineral deposits involves significant financial risks which even a combination of careful evaluation, experience and knowledge may not eliminate. While the discovery of a body of mineralization may result in substantial rewards, few properties that are explored are ultimately developed into producing mines.

Similarly, the economics of developing gold and other mineral properties are affected by many factors including capital and operating costs, variations of the tonnage and grade of ore mined, fluctuating mineral markets, and such other factors as government regulations, including regulations relating to royalties, allowable production, importing and exporting of minerals and environmental protection. Depending on the prices of silver, gold or other minerals produced, the Company may determine that it is impractical to commence or continue commercial production.

Substantial expenditures are required to discover an orebody, to establish reserves, to identify the appropriate metallurgical processes, to extract metal from ore, and to develop mining and processing facilities and infrastructure.

The marketability of any minerals acquired or discovered may be affected by numerous factors which are beyond the Company’s control and which cannot be accurately foreseen or predicted, such as market fluctuations, conditions for precious and base metals, the proximity and capacity of milling and smelting facilities, and such other factors as government regulations, including regulations relating to royalties, allowable production, importing and exporting minerals and environmental protection. Unsuccessful exploration or development programs could have a material adverse impact on the Company’s operations and profitability.

Infrastructure

Development and exploration activities depend on adequate infrastructure. Reliable roads, bridges, power and water supplies are important determinants that affect the ability to operate and the costs of operations. The Company’s ability to obtain a secure supply of power and water at a reasonable cost depends on many factors, including: global and regional supply and demand; political and economic conditions; localized logistical challenges; delivery; successful negotiation of commercial agreements; relevant regulatory regimes and obtaining an agreement to connect the Company’s transmission line to Coast Mountain’s infrastructure, as contemplated in our Technical Report. Unusual or infrequent weather phenomena, sabotage or government, and other interference in the maintenance or provision of such infrastructure could adversely affect the activities and profitability of the Company.

Acquisitions and Integration

From time to time, the Company may pursue opportunities to acquire additional mining assets and businesses. Any acquisition that the Company may choose to complete may be of a significant size, may change the scale of the Company’s business and operations and may expose the Company to new geographic, political, operating, financial and geological risks.

The Company’s success in its acquisition activities will depend on its ability to identify suitable acquisition candidates that fit its business strategy, negotiate acceptable terms for any such acquisition, identify significant legal, financial or operational risks as part of the due diligence process, obtain approvals from regulatory authorities in the jurisdiction of the business or property to be acquired, and integrate the acquired operations successfully with those of the Company.

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Any mergers and acquisitions, including the QuestEx Transaction and the Newmont Transaction, will be accompanied by risks. For example, there may be a significant change in commodity prices, applicable laws or other relevant facts after the Company has committed to complete the transaction and established the purchase price or exchange ratio; the conditions to closing a transaction may not be satisfied or the transaction may otherwise be terminated; a material mineralized deposit may prove to contain resources that are below the Company’s expectations; the due diligence process may fail to uncover all legal, financial and operational risks; the Company may have difficulty integrating and assimilating the operations and personnel of any acquired companies, realizing anticipated synergies and maximizing the financial and strategic position of the combined enterprise, and maintaining uniform standards, policies and controls across the organization; the integration of the acquired business or assets may disrupt the Company’s ongoing business and its relationships with employees, customers, suppliers and contractors; and, to the extent that the Company makes an acquisition outside of markets in which it has previously operated, the Company may have difficulty conducting and managing operations in a new operating environment.

Acquiring additional businesses or properties could place increased pressure on the Company’s cash flow if such acquisitions involve cash consideration. If the Company chooses to raise debt capital to finance any such acquisition, the Company’s leverage will be increased. If the Company chooses to use equity as consideration for such acquisition, existing shareholders may suffer dilution. Alternatively, the Company may choose to finance any such acquisition with its existing resources. The integration of the Company’s existing operations with any acquired business will require significant expenditures of time, attention and funds. Achievement of the benefits expected from consolidation would require the Company to incur significant costs in connection with, among other things, implementing financial and planning systems. The Company may not be able to integrate the operations of an acquired business or restructure the Company’s previously existing business operations without encountering difficulties and delays. In addition, this integration may require significant attention from the Company’s management team, which may detract attention from the Company’s day-to-day operations.

Over the short-term, difficulties associated with integration could have a material adverse effect on the Company’s business. In addition, the acquisition of mineral properties may subject the Company to unforeseen legal risks and liabilities, including environmental liabilities, which could have a material adverse effect on the Company. There can be no assurance that the Company would be successful in overcoming these risks or any other problems encountered in connection with such acquisitions.

Capital Cost Estimates

Our expected capital and operating costs for the Eskay Creek Project are based on the interpretation of geological and metallurgical data, feasibility studies, economic factors, anticipated climatic conditions and other factors that may prove to be inaccurate. Therefore, the Technical Report may prove to be unreliable if the assumptions or estimates do not reflect actual facts and events. The Technical Report estimates life of mine project capital costs for the Eskay Creek Project of $1.46 billion, but any of the following events, among the other events and uncertainties described herein, could affect the ultimate accuracy of such estimates: (i) unanticipated changes in grade and tonnage of ore to be mined and processed; (ii) incorrect data on which engineering and processing assumptions are made; (iii) delay in construction schedules and unanticipated transportation costs; (iv) the accuracy of major equipment and construction cost estimates; (v) labour and labour rate negotiations; (vi) changes in government regulation (including regulations regarding prices, cost of consumables, royalties, duties, taxes, permitting and restrictions on production quotas on exportation of minerals); (vii) macro-economic factors including (but not limited to) foreign exchange rates and inflation; and (viii) title claims.

Mineral Resource and Mineral Reserve Estimates

There are numerous uncertainties inherent in estimating mineral resources and mineral reserves, including many factors beyond the Company’s control. Such estimation is a subjective process, and the accuracy of any mineral reserve estimate is a function of the quality of available data and the assumptions made and judgements used in engineering and geological interpretation. Differences between management’s assumptions and actual results, including economic assumptions such as metal prices and market conditions, could have a material effect in the future on the Company’s financial position and results of operations. The Company’s gold production may fall below estimated levels as a result of mining accidents, such as cave-ins, rock falls, rock bursts, government-mandated shutdowns to prevent the spread of disease or as a result of other operational difficulties. In addition, production may be unexpectedly reduced if, during

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mine operations, mineral grades are lower than expected, the physical or metallurgical characteristics of the minerals are less amenable than expected to mine operations or treatment, or dilution increases.

Inferred Mineral Resources

Inferred mineral resources are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves. There is a risk that inferred mineral resources referred to in this Annual Information Form cannot be converted into measured or indicated mineral resources as there may be limited ability to assess geological continuity. Due to the uncertainty that may attach to inferred mineral resources, there is no assurance that inferred mineral resources will be upgraded to resources with sufficient geological continuity to constitute proven and probable mineral reserves as a result of continued exploration.

Production Estimates

The Company’s Technical Report contains estimates relating to potential future production and future production costs for the Eskay Creek Project. No assurance can be given that production estimates will be achieved. These production estimates are dependent on, among other things, the accuracy of mineral reserve estimates, the accuracy of assumptions regarding ore grades and recovery rates, ground conditions, physical characteristics of ores, such as hardness and the presence or absence of particular metallurgical characteristics and the accuracy of estimated rates and costs of mining and processing. The failure to of the Company to achieve production estimates could have a material and adverse effect on any or all of its cash flows, profitability, results of operations and financial condition.

Safety, Health, and Environmental Regulations

Safety, health and environmental legislation affects nearly all aspects of the Company’s operations, including exploration, mine development, working conditions, waste disposal, emission controls and protection of endangered and protected species. Compliance with safety, health and environmental legislation can require significant expenditures and failure to comply with such legislation may result in the imposition of fines and penalties, the temporary or permanent suspension of operations, clean-up costs resulting from contaminated properties, damages and the loss of important permits. Exposure to these liabilities arises not only from the Company’s existing operations, but from operations that have been closed. The Company could also be held liable for worker exposure to contagious disease or hazardous substances and for accidents causing injury or death. There can be no assurances that the Company will comply with all safety, health and environmental regulations at all times, or that steps to achieve compliance would not materially adversely affect the Company’s business.

Safety, health and environmental laws and regulations are evolving in all jurisdictions where the Company has activities. The Company is not able to determine the specific impact that future changes in safety, health and environmental laws and regulations may have on its operations and activities, and its resulting financial position; however, the Company anticipates that capital expenditures and operating expenses will increase in the future as a result of the implementation of new and increasingly stringent safety, health and environmental regulations.

Climate change may exacerbate or create new operational risks for the Company. Physical risks of climate change may also have an adverse effect on the Company’s properties and projects, access to local infrastructure and resources, and the health and safety of employees and contractors at the Company’s operations, which may result in an adverse impact on the Company’s business and financial position. These risks include sea level rise, extreme weather events, changing temperatures, increased snow packs, impact on water availability, and resource shortages.

In addition, climate change continues to be a top priority for many countries and jurisdictions around the world and governments and regulators continue to implement and develop new rules and regulations to control carbon gas or “green-house” gas emissions attributable to climate change. As part of their efforts to shift to lower-carbon economies, governments have implemented carbon pricing, a mechanism that harnesses market forces to address climate change by creating financial incentives to lower emissions. Some of these mechanisms include the implementation of taxes on fuel sales, emissions trading schemes, and fossil fuel extraction fees, all of which are expected to play an ongoing role in global efforts to address climate change. The cost of compliance with various climate change regulations will ultimately be determined by the regulations themselves and by the markets that evolve for carbon credits and offsets and, as a result, the financial impact, if any, on the Company’s operations cannot yet be fully understood.

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Both Canada and British Columbia have established regulations to control greenhouse gas emissions including carbon taxation. The Government of Canada introduced the Greenhouse Gas Pollution Pricing Act in 2019, which establishes a federal carbon levy for any province or territory without a similar carbon-pricing regime. The federal carbon tax rate was initially set at $20 per tonne of CO2 equivalent (tCO2e) in 2019, increasing $10 per year to $50/tCO2e by 2022. BC’s Carbon Tax Act is considered sufficiently similar to the federal requirements that our BC projects will not be subject to the federal Greenhouse Gas Pollution Pricing Act. On April 1, 2023, BC’s carbon tax rate, under the Carbon Tax Act, rose from $50 to $65/tCO2e.

In 2020, the Government of Canada introduced Bill C-12, the Canadian Net-Zero Emissions Accountability Act and released the A Healthy Environment and a Healthy Economy climate plan to achieve Canada’s climate goals including net zero GHG emissions by 2050. This plan includes a proposal to increase the price of carbon by $15/tCO2e per year from 2023 to $170/tCO2e by 2030. BC has announced its intention to follow, or exceed, these commitments. Both BC and Canada also provide industrial incentive programs to support operations transitioning to a net zero carbon emissions pathway.

Further changes in safety, health and environmental laws, new information on existing safety, health and environmental conditions or other events, including legal proceedings based upon such conditions or an inability to obtain necessary permits, may require increased financial reserves or compliance expenditures or otherwise have a material adverse effect on the Company. Environmental and regulatory review can be a long and complex process that may delay the opening, modification or expansion of a mine, extend decommissioning at a closed mine, or restrict areas where exploration activities may take place.

Saleable Concentrate

The Company anticipates that Eskay Creek operation will produce a precious metal concentrate on site, which will then be shipped out of the province to processing facilities. There is currently no contract in place with any smelter or buyer for any such concentrate. Given the complexity of the expected Eskay Creek concentrate, combined with the historical production of relatively difficult-to-market concentrates from the mine during its previous operational period, there can be no assurance that the Company will be able to secure a suitable agreement with a smelter or buyer for its concentrate. The most likely market for the concentrate is China, which under current geopolitical conditions poses a risk for the Company to successfully market saleable concentrate.

Tailings and Water Management

Tailings and water at existing mine sites require management and long-term planning to meet regulatory requirements and public expectation. Improper management can result in regulatory (site specific permits and statute) violations and subsequent consequences including administrative penalties, mandated management infrastructure (such as treatment or storage facilities), and mandated enhanced personnel capacity. These consequences can have direct impacts in the form of unanticipated expenditures and indirect impacts of lost opportunities resulting from resources being diverted to manage these issues. Improper management can also have significant impacts on the social license of an enterprise. A significant failure can result in undermining of public confidence in the organization which can impact its ability to advance development plans and achieve regulatory support for its existing operations.

Management

The success of the Company is currently largely dependent on the performance of its executive management team. There is no assurance the Company can retain or maintain the services of its management or other qualified personnel required to operate its business. Failure to do so could have a material adverse effect on the Company, its business, and its prospects.

Ability to Implement Business Strategy

There can be no assurance that Skeena’s management team will be successful in implementing its strategy (including as set out in this Annual Information Form) or that past results will be reproduced going forward. The management team may experience difficulties in effecting key strategic goals such as the growth, development and investment in the Eskay Creek Project or the successful exploration and development of exploration projects more generally. The

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performance of Skeena’s operations could be adversely affected if the Company’s management team cannot implement the stated business strategy effectively.

Key Personnel

Skeena’s success depends significantly on the continued individual and collective contributions of its senior, regional and local management teams. The loss of the services of members of these management teams or the inability to hire and retain experienced replacement management personnel could have a material adverse effect on Skeena’s business, results of operations and financial condition. In addition, to implement and manage Skeena’s business and operating strategies effectively, the Company must maintain a high level of efficiency and performance, continue to enhance its operational and management systems and continue to successfully attract, train, motivate and manage its employees. If Skeena is not successful in these efforts, this may have a material adverse effect on its business, results of operations and financial condition.

Any departures of key personnel could also be viewed in a negative light by investors and research analysts, which could cause the price of Common Shares to decline, and could cause difficulty raising capital for continued operations, including exploration and development.

Title to Assets

Although the Company has or will receive title opinions for any properties in which it has a material interest, there is no guarantee that title to such properties will not be challenged or impugned. The Company has not conducted surveys of the claims in which it holds direct or indirect interests and, therefore, the precise area and location of such claims may be in doubt. The Company’s claims may be subject to prior unregistered agreements or transfers or Indigenous land claims. In addition, title may be affected by unidentified or unknown defects.

The Company has conducted thorough investigations into the title of properties that it has acquired or will be acquiring to achieve a high level of assurance that there are no other claims or agreements that are likely to impact the Company’s title to the concessions or claims. If title to the Company’s properties is disputed, it may result in the Company paying substantial costs to settle the dispute or to clear the title and could result in the loss of the property, which events may affect the economic viability of the Company.

Indigenous Rights and UNDRIP

The Company operates and conducts exploration on properties which are subject to asserted Indigenous rights and title. The Company is committed to engaging with rights-holding Indigenous Groups about any potential impact of its activities on such rights so as to avoid or mitigate such impacts, which may result in delays or changes to exploration or mineral development activities.

In addition, the Government of British Columbia has adopted the Declaration on the Rights of Indigenous Peoples Act (2019) (“DRIPA”) to implement the United Nations Declaration on the Rights of Indigenous Peoples (“UNDRIP”) in British Columbia. The legislation commits to a systematic review of the province’s laws for alignment with UNDRIP principles, while also encouraging new agreements with Indigenous Groups that are intended to address outstanding governance questions around the nature of Indigenous rights and title interests in British Columbia. On June 6, 2022, the Province of British Columbia entered into a consent-based decision-making agreement under section 7 of DRIPA with TCG with respect to the Eskay Creek Project. The agreement requires that the statutory power of a decision on the Eskay Creek Project under the Environmental Assessment Act (British Columbia) either (a) would be exercised jointly by the Province of British Columbia and TCG; or (b) could only be exercised by the Province of British Columbia if the prior informed consent of the TCG has been obtained. On January 17, 2023, TCG, the Government of BC, and Skeena signed a permitting Process Charter agreement for the Eskay Creek Project. While there remains significant risks to the permitting of the Eskay Creek Project, the agreement provides greater certainty and framework for the environmental assessment of the Eskay Creek Project, and will further strengthen Skeena’s relationship with the Tahltan Nation and the Nation’s support for the Eskay Creek Project.

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Mining Risks and Insurance

The business of mining is generally subject to numerous risks and hazards, including environmental hazards, industrial accidents, contagious disease hazards, labour disputes, encountering unusual or unexpected geologic formations, cave-ins, flooding and periodic interruptions due to inclement or hazardous weather conditions at its existing locations in British Columbia. Such risks could result in damage to, or destruction of, mineral properties or producing facilities, personal injury, environmental damage, delays in mining, monetary losses and possible legal liability. The Company’s insurance will not cover all the potential risks associated with its operations. In addition, although certain risks are insurable, the Company may be unable to maintain insurance to cover these risks at economically feasible premiums. Insurance against environmental risks (including potential for pollution or other hazards as a result of disposal of waste products occurring from exploration and production) is not generally available to the Company or to other companies within the industry on acceptable terms.

The Company carries insurance to protect against certain risks in such amounts as it considers adequate. Risks not insured against include, without limitation, environmental pollution, mine flooding or other hazards against which the Company and others within the industry cannot insure or against which they may elect not to insure. Losses from uninsured events may cause the Company to incur significant costs. The activities of the Company are subject to a number of challenges over which the Company has little or no control, but that may delay production and negatively impact the Company’s financial results, including: increases in energy, fuel and/or other production costs; higher insurance premiums; industrial accidents; labour disputes; shortages of skilled labour; contractor availability; unusual or unexpected geological or operating conditions; slope failures; cave-ins of underground workings; and failure of pit walls or dams. If the Company suffers losses or events for which it is uninsured or under-insured, the Company may experience losses and may curtail or suspend some or all of its exploration, development and mining activities.

Development Risks

Future development of the Company’s business may not yield expected returns and may strain management resources. Development of the Company’s revenue streams is subject to a number of risks, including construction delays, cost overruns, financing risks, cancellation of key service contracts and changes in government regulations. Overall costs may significantly exceed the costs that were estimated when the project was originally undertaken, which could result in reduced returns, or even losses, from such investments. Significant fluctuation in prevailing prices for gold and other metals may affect the profitability of projects.

Competition for New Properties

The mining industry is intensely and increasingly competitive in all its phases, and the Company may have to compete with other companies that have greater financial and technical resources. Competition in the metals mining industry is primarily for mineral rich properties which can be developed and produced economically and businesses compete for such properties and the technical expertise to find, develop, and produce such properties, the skilled labor to operate the properties and the capital for the purpose of financing development of such properties. Such competition could adversely affect the Company’s ability to acquire suitable producing properties or prospects for mineral exploration, recruit or retain qualified employees or acquire the capital necessary to fund its operations and develop its properties.

Pre-Existing Environmental Liabilities

Environmental liabilities exist on the properties in which Skeena currently holds, primarily as a result of activities of previous owners. The Company has estimated and accrued for the costs of remediating these environmental issues, however the costs of remediation may be substantially higher than estimated.

Pre-existing environmental liabilities may exist on the properties in which Skeena currently holds an interest or on properties that may be subsequently acquired by Skeena which are unknown, and which have been caused by previous or existing owners or operators of the properties. In such event, the Company may be required to remediate these properties and the costs of remediation could be substantial. Further, in such circumstances, the Company may not be able to claim indemnification or contribution from other parties. In the event Skeena is required to undertake and fund

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significant remediation work, such event could have a material adverse effect upon the Company and the value of the Common Shares.

Liquidity and Capital Resources

As at December 31, 2024, the Company had net working capital2 of $30.9 million, compared to net working capital of $72.3 million as at December 31, 2023. The estimated capital cost to develop the Eskay Creek Project is in excess of $712.9 million. See “Capital and Operating Costs”.

The Company does not currently generate income from operations. The Company will need further funding to support the advancement of the Eskay Creek Project towards development and to meet general corporate and working capital requirements. Historically, capital requirements have been funded through equity financing, joint ventures, disposition of mineral properties and investments, and through the use of credit facilities with related parties. While management is confident that additional sources of funding will be secured to fund planned expenditures, factors that could affect the availability of financing include the progress and results of ongoing project evaluation activities at the Company’s Eskay Creek Project, the state of international debt and equity markets, investor perceptions and expectations of the global gold, silver and/or other metals markets. If necessary, the Company may explore opportunities to revise the due dates of its liabilities, and/or settle its liabilities through the issuance of common shares and other equity instruments. Based on the amount of funding raised, the Company’s planned initiatives and other work programs may be postponed, or otherwise revised, as necessary.

Dependence on Equipment and Skilled Labour

The ability of the Company to compete and grow will be dependent on it having access, at a reasonable cost and in a timely manner, to skilled labour, equipment, parts and components. No assurances can be given that the Company will be successful in maintaining its required supply of skilled labour, equipment, parts and components. The failure to do so could have a material adverse effect on the financial results of the Company.

Reliance on Consultants

The Company has relied on, and may continue to rely on, consultants and others for mineral exploration and exploitation expertise. The Company believes that those consultants are competent and that they have carried out their work in accordance with recognized industry standards. However, if the work conducted by those consultants is ultimately found to be incorrect or inadequate in any material respect, the Company may experience delays or increased costs in developing its properties.

Reputational Damage to the Company

Damage to the Company’s reputation can be the result of the actual or perceived occurrence of any number of events, and could include any negative publicity, whether true or not. The increased usage of social media and other web-based tools used to generate, publish, and discuss user-generated content and to connect with other users has made it increasingly easier for individuals and groups to communicate and share opinions and views in regards to the Company and its activities, whether true or not. Although the Company believes that it operates in a manner that is respectful to all stakeholders and that it takes care in protecting its image and reputation, the Company does not ultimately have direct control over how it is perceived by others. Reputation loss may result in decreased investor confidence, increased challenges in developing and maintaining community relations, and an impediment to the Company’s overall ability to advance its projects, thereby having a material adverse impact on financial performance, financial condition, cash flows, and growth prospects.

Uninsured or Uninsurable Risk

The Company may be subject to liability for risks against which it cannot insure or against which the Company may elect not to insure due to the high cost of insurance premiums or other factors. The payment of any such liabilities would

2   Working capital, a non-IFRS-measure, is defined as current assets net of current liabilities.

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reduce the funds available for the Company’s normal business activities. Payment of liabilities for which the Company does not carry insurance may have a material adverse effect on the Company’s financial position and operations.

Government Regulations, Permits and Licenses

The Company’s operations may be subject to governmental laws or regulations promulgated by various legislatures or governmental agencies from time to time. A breach of such legislation may result in imposition of fines and penalties. The cost of compliance with changes in governmental regulations has a potential to reduce the profitability of operations.

The Company intends to fully comply with all governmental laws and regulations. There can be no assurance, however, that all permits which the Company may require for its operations and activities will be obtainable on reasonable terms or on a timely basis, that the Company will be able to sufficiently comply with such laws and regulations or that such laws and regulations would not have a material adverse effect on the Company’s business.

In 2019, the Canadian Impact Assessment Act came into force with significant changes to the federal government’s current environmental assessment and regulatory processes for resource development projects. While the new legislation does not affect Skeena’s current projects, it will apply to new projects which meet certain criteria. Similarly, in 2019, the British Columbia government reformed the province’s environmental assessment process for resource projects, introducing significant new changes into the environmental assessment process for industrial and resource projects in British Columbia, including new rules surrounding project notifications, early engagement and increased public participation, along with new timelines dictating when certain steps must be taken throughout the environmental assessment process. These changes and any other new legislation may affect the Company’s ability to obtain or renew permits for operations and projects in an efficient and cost-effective manner or at all.

Regulatory Risks

Successful execution of the Company’s business is contingent, in part, upon compliance with regulatory requirements enacted by governmental authorities and obtaining all regulatory approvals, where necessary, for the operation of its business.

The Company will incur ongoing costs and obligations related to regulatory compliance. Failure to comply with regulations may result in additional costs for corrective measures, penalties, or in restrictions on the Company’s operations. In addition, changes in regulations, more vigorous enforcement thereof, or other unanticipated events could require extensive changes to the Company’s operations, increased compliance costs, or give rise to material liabilities, which could have a material adverse effect on the business, financial condition, and operating results of the Company.

Regulatory or Agency Proceedings, Investigations, and Audits

The Company’s business requires compliance with many laws and regulations. Failure to comply with these laws and regulations could subject the Company to regulatory or agency proceedings or investigations and could also lead to damage awards, fines and penalties. Skeena may become involved in a number of government or agency proceedings, investigations, and audits. The outcome of any regulatory or agency proceedings, investigations, audits, and other contingencies could harm the Company’s reputation, require the Company to take, or refrain from taking, actions that could harm its operations or require Skeena to pay substantial amounts of money, harming its financial condition. There can be no assurance that any pending or future regulatory or agency proceedings, investigations, and audits will not result in substantial costs or a diversion of management’s attention and resources or have a material adverse impact on the Company’s business, financial condition, and results of operation.

Price Volatility of Publicly Traded Securities

In recent years, the securities markets in Canada and the United States have experienced a high level of price and volume volatility and the market prices of securities of many companies have experienced wide fluctuations in price

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which have not necessarily been related to the operating performance, underlying asset values or prospects of such companies. There can be no assurance that continual fluctuations in price or volume will not occur.

It may be anticipated that any quoted market for the Common Shares of the Company will be subject to market trends generally, notwithstanding any potential success or challenges of the Company in creating revenues, cash flows or earnings.

Dividends

The Company has not paid any dividends on the Common Shares since incorporation and does not anticipate paying dividends in the immediate future. The payment of future dividends, if any, will be reviewed periodically by the Board of Directors and will depend upon, among other things, conditions then existing including earnings, financial requirements and other factors existing at such time that the Board of Directors may consider appropriate in the circumstances including, but not limited to, commodity prices, production levels, capital expenditure requirements, debt service requirements, if any, operating costs, royalty burdens, foreign exchange rates and the satisfaction of the liquidity and solvency tests imposed by the Business Corporations Act (British Columbia) for the declaration and payment of dividends.

Economic Conditions for Mining

The market price for precious metal commodities is historically volatile. During periods of decreased precious metal prices, the mining and minerals sectors in general are affected negatively, and may impact the Company’s market capitalization. Any sudden or rapid destabilization of global economic conditions, including the current conflict between Russia and Ukraine and the Israel-Palestine conflict, and the accompanying international response, may impact the Company’s ability to obtain equity or debt financing in the future on terms favorable to the Company or at all. In such an event, the Company’s operations and financial condition may be adversely affected.

Market Risk for Securities

The market price for the Common Shares could be subject to wide fluctuations. Factors such as commodity prices, government regulation, interest rates, share price movements of peer companies, and competitors, as well as overall market movements, may have a significant impact on the market price of the Company. The stock market has from time-to-time experienced extreme price and volume fluctuations, which have often been unrelated to the operating performance of particular companies.

Securities or Industry Research and Reports

The trading market for the Common Shares could be influenced by the research and reports that industry or securities analysts publish about the Company. If one or more of these analysts cease coverage or fail to regularly publish reports, the Company could lose visibility in the financial markets, which in turn could cause the trading price or volume of its Common Shares to decline. Moreover, if one or more of the analysts downgrade the Company or its Common Shares or if the Company’s operating results do not meet their expectations, the trading price of the Common Shares could decline.

Litigation

The Company is party to, and may become party to litigation from time to time in the ordinary course of business which could adversely affect its business, including any future appeals made by the Company in relation to the Albino Lake Storage Facility. Should any litigation in which the Company is, or becomes involved be determined against the Company, such a decision could adversely affect the Company’s ability to continue operating, could negatively impact the value of the Common Shares, and could use significant resources. Even if Skeena is involved in litigation and wins, litigation can redirect significant Company resources, including the time and attention of management and available working capital. Litigation may also create a negative perception of the Company’s brand.

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Potential Conflicts of Interest

Certain of the directors and officers of the Company also serve as directors and/or officers of other companies involved in the industries in which the Company operates, and consequently there exists the possibility for such directors and officers to be in a position of conflict. Any decision made by any of such directors and officers will be made in accordance with their duties and obligations to deal fairly and in good faith with a view to the best interests of the Company. Conflicts of interest, if any, will be subject to the procedures and remedies provided under applicable laws and the internal policies and procedures of the Company.

Legal and Accounting Requirements

As a publicly-listed company, the Company is subject to numerous legal and accounting requirements that do not apply to private companies including the rules and regulations promulgated by a number of governmental and self-regulated organizations, including the Canadian and United States securities administrators and regulators, the TSX and the NYSE. These rules and regulations continue to evolve in scope and complexity creating many new requirements. The cost of compliance with many of these requirements is material. Failure to comply with these requirements can have numerous adverse consequences including, but not limited to, the Company’s inability to file required periodic reports on a timely basis, loss of market confidence, delisting of its securities and/or governmental or private actions against the Company. There can be no assurance that the Company will be able to comply with all of these requirements or that the cost of such compliance will not prove to be a substantial competitive disadvantage vis-à-vis privately-held and larger public competitors.

Continued Listing Criteria of the TSX and NYSE

The Common Shares are currently listed on the TSX and the NYSE. In order to maintain the listing, the Company must maintain compliance with certain corporate governance and financial and share distribution targets, including maintaining a minimum number of public shareholders, and, in the case of the NYSE, a minimum share price. In addition to objective standards, the TSX or the NYSE may delist the securities of any issuer if, in its opinion: the issuer’s financial condition and/or operating results appear unsatisfactory; if the Company fails to accurately report financial performance on a timely basis; if it appears that the extent of public distribution or the aggregate market value of the security has become so reduced as to make continued listing on the TSX or the NYSE inadvisable; if the issuer sells or disposes of principal operating assets or ceases to be an operating company; if an issuer fails to comply with the listing requirements of TSX or the NYSE; or if any other event occurs or any condition exists which makes continued listing on the TSX or the NYSE, in the opinion of the TSX or the NYSE, inadvisable.

If the TSX or the NYSE delists our Common Shares, investors may face material adverse consequences, including, but not limited to, a lack of trading market for the common shares, reduced liquidity, decreased analyst coverage of the Company, and an inability for us to obtain additional financing to fund our operations.

Risks of Enforcing U.S. Judgments

The Company is incorporated under the laws of British Columbia, Canada and its corporate offices are located in Canada. The majority of the Company’s directors and officers and certain of the experts named herein are not residents of the United States and the majority of our assets and the assets of these persons are located outside the United States. It may be difficult for investors who reside in the United States to effect service of process within the United States upon the Company or upon such persons who are not residents of the United States, or to enforce a U.S. court judgment predicated upon civil liabilities under U.S. federal securities laws against the Company or any of these persons. A judgment of a U.S. court predicated solely upon such civil liabilities may be enforceable in Canada by a Canadian court if the U.S. court in which the judgment was obtained had jurisdiction, as determined by the Canadian court, in the matter. There is substantial doubt whether an original action could be brought successfully in Canada in the first instance against any of such persons or the Company predicated solely upon such U.S. federal securities laws.

Foreign Private Issuer Disclosure Requirements

The Company is a “foreign private issuer”, as such term is defined in Rule 405 of the United States Securities Act of 1933, as amended, and not subject to the same requirements that are imposed upon U.S. domestic issuers by the SEC.

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Under the U.S. Securities Exchange Act of 1934, as amended (the “U.S. Exchange Act”), the Company is subject to reporting obligations that, in certain respects, are less detailed and less frequent than those of U.S. domestic reporting companies. As a result, the Company does not file the same reports that a U.S. domestic issuer would file with the SEC, although it is required to file or furnish to the SEC the continuous disclosure documents that it is required to file in Canada under Canadian securities laws.

In addition, the Company’s officers, directors, and principal shareholders are exempt from the reporting and “short swing” profit recovery provisions of Section 16 of the U.S. Exchange Act. Therefore, its shareholders may not know on as timely a basis when its officers, directors and principal shareholders purchase or sell Common Shares, as the reporting deadlines under the corresponding Canadian insider reporting requirements are longer.

As a foreign private issuer, the Company is exempt from the rules and regulations under the U.S. Exchange Act related to the furnishing and content of proxy statements. It is also exempt from Regulation FD, which prohibits issuers from making selective disclosures of material non-public information. While the Company will comply with the corresponding requirements relating to proxy statements and disclosure of material non-public information under Canadian securities laws, these requirements differ from those under the U.S. Exchange Act and Regulation FD and shareholders should not expect to receive the same information at the same time as such information is provided by U.S. domestic companies. In addition, the Company is not required under the U.S. Exchange Act to file annual or quarterly reports with the SEC as promptly as U.S. domestic companies whose securities are registered under the U.S. Exchange Act.

In addition, as a foreign private issuer, the Company has the option to follow certain Canadian corporate governance practices, except to the extent that such laws would be contrary to U.S. securities laws, and provided that it discloses the requirements it is not following and describe the Canadian practices it follows instead. The Company currently relies on this exemption with respect to requirements regarding the quorum for any meeting of its shareholders. The Company may in the future elect to follow home country practices in Canada with regard to other matters. As a result, its shareholders may not have the same protections afforded to shareholders of U.S. domestic companies that are subject to all U.S. corporate governance requirements.

Loss of Foreign Private Issuer Status

The Company may in the future lose its foreign private issuer status if a majority of the voting power of the Company is held in the United States and it fails to meet the additional requirements necessary to avoid the loss of foreign private issuer status, such as if: (i) a majority of its directors or executive officers are U.S. citizens or residents; (ii) a majority of its assets are located in the United States; or (iii) its business is administered principally in the United States. Although the Company may elect to comply with certain U.S. regulatory provisions, its loss of foreign private issuer status would make such compliance mandatory. The regulatory and compliance costs to the Company under securities laws as a U.S. domestic issuer will be significantly more than the costs incurred as a Canadian foreign private issuer. If the Company was not a foreign private issuer, it would not be eligible to use foreign issuer forms and would be required to file periodic and current reports and registration statements on U.S. domestic issuer forms with the SEC, which are generally more detailed and extensive than the forms available to a foreign private issuer. In addition, the Company may lose its ability to rely upon exemptions from certain corporate governance requirements on U.S. stock exchanges that are available to foreign private issuers.

Accounting Policies and Internal Controls

The Company prepares its financial reports in accordance with International Financial Reporting Standards. In preparation of its financial reports, management may need to rely upon assumptions, make estimates or use their best judgment in determining the financial condition of the Company. Significant accounting policies are described in more detail in the Company’s audited financial statements. In order to have a reasonable level of assurance that financial transactions are properly authorized, assets are safeguarded against unauthorized or improper use, and transactions are properly recorded and reported, the Company has implemented and continues to evaluate its internal control systems for financial reporting, as further explained in the MD&A. Although the Company believes its financial reporting

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and financial statements are prepared with reasonable safeguards to ensure reliability, the Company cannot provide absolute assurance in this regard.

Risks Related to Dilution

The market price of the Common Shares could decline as a result of issuances of securities by the Company or sales by its existing shareholders of Common Shares in the market, or the perception that these sales could occur. The issuance of Common Shares upon the exercise of the Company’s outstanding Options may also reduce the market price of the Common Shares. Additional Common Shares and Options may be issued in the future. A decrease in the market price of the Common Shares could adversely affect the liquidity of the Common Shares on the TSX and NYSE. The Company’s shareholders may be unable, as a result, to sell significant quantities of the Common Shares into the public trading markets. The Company may not, as a result, have sufficient liquidity to meet the continued listing requirements of the TSX and the NYSE. Sales of the Common Shares by shareholders might also make it more difficult for the Company to sell equity or debt securities at a time and price that it deems appropriate, which may have a material adverse effect on the Company’s business, financial conditions and results of operations.

Competition

There is potential that the Company will face intense competition from other companies, some of which can be expected to have longer operating histories and more financial resources and project construction, developing, manufacturing and marketing experience than the Company. Increased competition by larger and better resourced competitors could materially and adversely affect the business, financial condition, and results of operations of the Company.

Fraudulent or Illegal Activity by Employees, Contractors, and Consultants

The Company is exposed to the risk that its employees, independent contractors, and consultants may engage in fraudulent or other illegal activity. Misconduct by these parties could include intentional, reckless and/or negligent conduct or disclosure of unauthorized activities to the Company that violates: (i) government regulations; (ii) manufacturing standards; (iii) federal and provincial fraud and abuse laws and regulations; (iv) environmental or health and safety laws, regulations or standards; or (v) laws that require the true, complete, and accurate reporting of financial information or data. It is not always possible for the Company to identify and deter misconduct by its employees and other third parties, and the precautions taken by the Company to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting the Company from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. If any such actions are instituted against Skeena, and it is not successful in defending itself or asserting its rights, those actions could have a significant impact on Skeena’s business, including the imposition of civil, criminal, and administrative penalties, damages, monetary fines, contractual damages, reputational harm, diminished profits, and future earnings, and curtailment of the Company’s operations, any of which could have a material adverse effect on the Company’s business, financial condition, and results of operations.

Information Technology Systems and Cyber Attacks

The Company’s operations will depend, in part, on how well it and its suppliers and service providers protect networks, equipment, IT systems, and software against damage from a number of threats, including, but not limited to, cable cuts, damage to physical plants, natural disasters, intentional damage, destruction, fire, power loss, hacking, computer viruses, vandalism, and theft. The Company’s operations will also depend on the timely maintenance, upgrades, and replacement of networks, equipment, IT systems and software, as well as pre-emptive expenses to mitigate the risks of failures. Any of these and other similar events could result in information system failures, delays, and/or increase in capital expenses. The failure of information systems or a component of information systems could, depending on the nature of any such failure, adversely impact the Company’s reputation, business, results of operations, financial condition and share price. Further, security breaches such as misappropriation, misuse, leakage, falsification, accidental release or loss of information contained in the Company’s information technology systems including personnel and other data could damage its reputation and require the Company to expend significant capital and other resources to remedy any such security breach.

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There can be no assurance that the Company will not incur such losses in the future. The Company’s risk and exposure to these matters cannot be fully mitigated because of, among other things, the evolving nature of these threats.

As a result, cyber-security and the continued development and enhancement of controls, processes, and practices designed to protect systems, computers, software, data, and networks from attack, damage, or unauthorized access is a priority. As cyber threats continue to evolve, the Company may be required to expend additional resources to continue to modify or enhance protective measures or to investigate and remediate any security vulnerabilities.

The Company’s Use of Technology and Artificial Intelligence (“AI”) Systems

The Company, its counterparties, third-party providers and vendors may from time to time use AI technology to make the Company’s operations and systems more efficient and productive. While the Company has set measures to oversee its use of AI technology, the Company has no way of ensuring that its third-party providers and vendors are engaging in risk-mitigating measures when adopting and using AI technology. In addition, as many AI technology systems are constantly evolving and becoming more effective, the Company may be at an increased risk of a cybersecurity attack where AI technology is used to circumvent security controls, evade detection and remove forensic evidence. As a result, the Company may be unable to detect, investigate, remediate or recover from future attacks or incidents, or to avoid a material adverse impact on its business.

Political and Economic Instability

The Company may be affected by future political or economic instability. The risks include, but are not limited to war, terrorism, military repression, extreme fluctuations in currency exchange rates, and high rates of inflation. Operations may be affected in varying degrees by government regulations with respect to restrictions on production, distribution, price controls, export controls, income taxes, and expropriation of property, maintenance of assets, environmental legislation, land use, land claims of local people, and water use, among other potential factors. The effect of any these factors cannot be accurately predicted.

Specifically, uncertainties resulting from the Russia-Ukraine and Israel-Palestine conflicts, and the accompanying international response, created increased volatility in commodity markets (including oil and gas prices), and disrupted international trade and financial markets, all of which have an ongoing and uncertain effect on global economics, supply chains, availability of materials and equipment, and execution timelines for project development. To date, the Company’s operations have not been materially negatively affected by the ongoing conflicts, but should these conflicts go on for an extended period of time, or should other geopolitical disputes and conflicts emerge in other regions, these could result in material adverse effects to the Company.

Uncertainty of Trade Policies

The imposition of trade tariffs, particularly by the U.S., or other trade restrictions could have significant repercussions for Canadian businesses, and the broader economy. Increased costs of goods and services may contribute to inflation. These tariffs, and any changes to these tariffs or imposition of any new tariffs, taxes or import or export restrictions or prohibitions, could have a material adverse effect on the Company’s business. Furthermore, there is a risk that the tariffs imposed by the U.S. on other countries will trigger a broader global trade war which could have a material adverse effect on the Canadian, U.S. and global economies. Overall, trade policy restrictions create financial uncertainty for companies, disrupt trade relationships, and put downward pressure on economic growth.

Financing Risk

The Company’s plans to advance its mineral properties towards and into development depend on securing the necessary funds to do so. There is no certainty that the Company will continue to be able to raise the necessary funds through the issuance of securities from treasury, sale of mineral properties, or acquiring funds through a private-lending mechanism.

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Tax

No assurance can be given that the Company’s tax positions will not be successfully challenged by tax authorities, new taxation rules will not be enacted, existing rules (including the flow-through share tax incentive program and the British Columbia Mineral Exploration Tax Credit program) will not be changed, or existing rules will not be applied in a manner which could result in the Company being subject to additional taxation or liability, or which could otherwise have a material adverse effect on the Company’s results from operations and financial condition.

New Diseases and Epidemics

The Company’s business, operations and financial condition could be materially and adversely affected by the outbreak of epidemics or pandemics or other health crises, including the COVID-19 pandemic (which, for the purposes of this Annual Information Form, includes any variants thereof, where applicable). Such public health crises can result in volatility and disruptions in the supply and demand for minerals, global supply chains and financial markets, as well as declining trade and market sentiment and reduced mobility of people, all of which could affect commodity prices, interest rates, credit ratings, credit risk, share prices and inflation. The risks to the Company of such public health crises also include risks to employee health and safety, additional slowdowns or temporary suspensions of operations in geographic locations impacted by an outbreak, increased labour, transportation and fuel costs, regulatory changes, political or economic instabilities or civil unrest. The extent to which COVID-19 will or may impact the Company is uncertain and these factors are beyond the Company’s control. Any increase in the severity of the pandemic or future outbreaks of COVID-19 could have a material adverse effect on the Company’s business, results of operations and financial condition.

Natural Disasters, Terrorist Acts, Civil Unrest, and Other Disruptions

Upon the occurrence of a natural disaster, or upon an incident of war, riot or civil unrest, including the current conflict between Russia and Ukraine or Israel and Palestine, the impacted country, province, or region may not efficiently and quickly recover from such event, which could have a material adverse effect on the Company, its customers, and/or either of their businesses or operations. Terrorist attacks, public health crises, domestic and global trade disruptions, infrastructure disruptions, civil disobedience or unrest, natural disasters, national emergencies, acts of war, technological attacks and related events can result in volatility and disruption to local and global supply chains, operations, mobility of people and the financial markets, which could affect interest rates, credit ratings, credit risk, inflation, business, financial conditions, results of operations and other factors relevant to the Company, its customers, and/or either of their businesses or operations, which may have a material adverse effect on the Skeena’s reputation, business, financial conditions or operating results.

MINERALPROJECTS

Eskay Creek Project

Technical Report

Please see the Company’s Technical Report in accordance with NI 43-101 dated November 14, 2023, titled “Eskay Creek Project, British Columbia, NI 43-101 Technical Report on Updated Feasibility Study”, in respect of the Eskay Creek Revitalization Project, as prepared by: Mr. Ben Adaszynski, P.Eng., Ms. Terre Lane, MMSA QP, Dr. Hamid Samari, MMSA QP, Mr. Jim Fogarty, P.Eng., Mr. Ian Stilwell, P.Eng., Mr. Rolf Schmitt, P.Geo., Mr. A.J. MacDonald, P.Eng., Mr. David Baldwin, P.Eng., and Mr. Steven Andrew Baisley, P.Geo. The report is available under the Company’s profile on SEDAR+ (www.sedarplus.com) and on EDGAR at www.sec.gov. Further financial information relating to the Eskay Creek Project can be found in the MD&A which is available under the Company’s profile on SEDAR+ (www.sedarplus.com).

Property Description, Location and Access

The Eskay Creek Project is located in the Golden Triangle region of British Columbia, Canada, 83 km northwest of Stewart, on the eastern flanks of the Coast Mountain ranges.

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The Eskay Creek Project is situated at an elevation of 800 m above sea level at 56° 39’ 13.9968” N and 130° 25’ 44.0004” W.

Access to the Eskay Creek Project is via Highway 37 (Stewart Cassiar Highway). The Eskay Mine Road is an all-season gravel road that connects to Highway 37 approximately 135 km north of Meziadin Junction (refer to Figure ‎2-1 – Project Location Map in the Technical Report). The Eskay Mine Road is a 59 km private industrial road that is operated by Coast Mountain Hydro Corp. (0 km to 43.5 km) and Skeena (43.5 km to 59 km).

There are two nearby gravel air strips: Bronson Strip which is about 40 km west of the mine site (not connected to the road system) and Bob Quinn air strip, roughly 37 km northeast of the Eskay Creek Project alongside Highway 37.  Bronson Strip is a private air strip operated by Snip Gold Inc. It is 1,500 m long and in fair condition. It is accessible to the project by helicopter only. The Bob Quinn Lake air strip is managed by the Bob Quinn Lake Airport Society, a not-for-profit organization consisting of government and local industry interests. The airstrip is about 1,300 m long and is in good condition. It is accessible to the project by the Eskay Mine Road.

Travel to the planned mine site from local population centres will be primarily by Highway 16 (e.g. Terrace or Smithers) and via Highway 37 north to the Bob Quinn and Eskay Mine Access road junction; however, there is a possibility that the proposed mine could fly personnel to the Bob Quinn airport and then provide a shuttle to transport personnel from the airport to the mine site.

Mineral Tenure, Surface Rights, Water Rights, Royalties and Agreements

The Eskay Creek Project covers a total of 7,666.02 ha and consists of the following (see Figure ‎4-1 – Mineral Tenure and Surface Lease Location Map in the Technical Report):

Of the 51 mineral claims, 49 mineral claims are 100% registered to Skeena, and two mineral claims are jointly held by Skeena (66.67%), and Canagold Resources Ltd (33.33%).

Five mineral leases are 100% held by Skeena and three mineral leases are jointly held by Skeena (66.6667%), and Canagold Resources Ltd (33.3333%).

All statutory annual reporting obligations have been met.

Mineral leases have an annual rent payment that is due yearly on the anniversary date of the lease. The payment is based on the amount of hectares within the lease, and is C$20/ha.

Mineral claims have a yearly work requirement based on the amount of hectares. A “Statement of Work” is required to be filed on the claims with the Mineral Tenure Branch and the company submits an assessment report detailing the work that was completed within 90 days.

Where on-ground work commitments have not been met, Skeena has made cash-in-lieu payments as stipulated under the BC Mineral Tenure Act Regulation.

Skeena holds the following surface rights interests:

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The locations of the surface leases were included in Figure ‎4-1.

District Lots underly the Eskay Creek tenures, and a title search indicates that there are no mineral or surface rights associated with the District Lots. Skeena will need to acquire surface rights in support of any future mining and processing activities.

Permit amendment for Surface Lease 740715 will be required to extend the boundary to include the surface area associated with the south end of the Tom MacKay Storage Facility (“TMSF”).

Skeena currently holds two water licences:

Skeena anticipates having to apply for additional water licences under the BC Water Sustainability Act, including the following subsections:

A 1% net smelter return (NSR) royalty on the entire Eskay Creek land package was payable to Barrick, with Skeena able to purchase half (0.5%) of that royalty. On September 23, 2022 Skeena purchased the 0.5% NSR, leaving a 0.5% royalty payable to Barrick.

On September 29, 2022 Barrick closed the sale of a portfolio of 22 royalties, including the 0.5% royalty with Skeena, to Maverix Metals Inc. (“Maverix”). Maverix was acquired by Triple Flag Precious Metals Corp. in early 2023.

This royalty is payable on all of the Mineral Reserves, and is included in the economic analysis in Section 22.

On December 30, 2022, Skeena granted a 0.5% NSR to Franco-Nevada Corp. (Franco-Nevada) on the Eskay Creek land package in exchange for a closing cash consideration of C$27 M and contingent cash consideration of C$1.5 M.  This royalty is payable on all of the Mineral Reserves, and is included in the economic analysis in Section 22.

Subsequent to the Technical Report effective date, on 18 December, 2023, Skeena concluded a financing package with Franco-Nevada. The package included the sale of a 1.0% NSR royalty on Eskay Creek for C$56 million over all of the land packages that make up the Eskay Creek Project. This royalty is payable on all of the Mineral Reserves, and is not included in the economic analysis in Section 22.  With this incremental royalty purchase, Franco-Nevada now holds a 2.5% NSR on the Eskay Creek Project.

Franco-Nevada also has a 1% NSR on the Kay-Tok property (Kay and Toc mining leases) based on a 1995 agreement. This royalty is payable on the Mineral Reserves on these leases, and is included in the economic analysis in Section 22.

ARC Resource Group Ltd. has a 2% royalty on the SKI, IKS and GNC properties.

This royalty is payable on the Mineral Reserves on the SKI mining lease, and is included in the economic analysis in Section 22.

The Eskay Creek Project has NSR royalty obligations on other land packages within the Eskay Creek Project area that are payable to third parties as shown in Table ‎4-3 – Land Package Royalties and Table ‎4-4 – Royalties by Claim of the

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Technical Report. The locations of the mineral tenures with royalty obligations were shown in Figure ‎4-2 – Lease and Claim Royalty Agreements.

None of these land packages currently host Mineral Resources or Mineral Reserves, and no royalties on these claims are currently payable.

On June 25, 2024, the Company announced that it had entered into the Project Financing Package. The Project Financing Package was comprised of:

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In connection with the Gold Stream Arrangement and the Senior Secured Loan, the Company entered into general security, share pledge agreements and block account agreements in favor of Orion.

Risks

The provincial and federal regulatory processes under recent legislative changes may influence overall timelines to amend the existing permits, address Indigenous consent and collaboration needs, and obtain new permits for the Eskay Creek Project, including the environmental assessment certificate as well as construction and operating permits. Additional work is underway to support permit amendments and new permit applications, including environmental baseline data collection, mine plan details, and environmental assessment and consultations. No permits for project commercial development will be issued before an environmental assessment certificate is obtained.

For the proposed Eskay Creek Project, Skeena will undertake a substituted process to amend an existing environmental assessment certificate or obtain a new environmental assessment certificate. The process to follow for the environmental assessment/impact assessment is being developed with the provincial and federal regulators, the Tahltan Nation and Skeena, based upon the legislative steps, criteria, and procedures.

Skeena submitted a Detailed Project Description to the federal and provincial regulators and Tahltan Central Government on August 11, 2022, to initiate the second phase (Readiness Decision) of the environmental assessment process. A process order was issued by the BC Government on April 18, 2023 which outlines the scope of the assessment and determines the application information requirements to be included in the application.

No technical or policy issues have been identified that would prevent obtaining the required project permits and approvals, given its long mining history, understanding and mitigation of environmental and social effects.

The current permits for the Eskay Creek mine do not consider operations at the scale contemplated in the 2021 pre-feasibility study or for the feasibility study scale open pit project. Additional work will be required to support permit updates and amendment applications, which will include environmental baseline data collection, environmental assessment and proposed mine plan and reclamation and closure plan.

The Eskay Creek Project is located within the traditional territory of Indigenous groups including the Tahltan Nation and the asserted territory of the Tsetsaut Skii Km Lax Ha, and access routes pass through lands subject to the Nisga’a Final Agreement treaty and the traditional territory of the Gitanyow Nation. Agreements with such groups that may be affected by the envisaged project remain to be negotiated. If such agreements include royalty or similar payments, this could result in changes to the assumptions made in the economic analysis. Skeena actively engages with communities of interest and Indigenous peoples to understand potential Eskay Creek Project effects and plan mitigative approaches collaboratively.

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History

The Eskay Creek Project area has a long exploration history, dating back to initial prospecting activities in 1932. Companies with Eskay Creek Project interests prior to Skeena’s involvement include Premier Gold Mining Co. Ltd., MacKay Gold Mines Ltd., Canadian Exploration Ltd., American Standard Mines Ltd., Pioneer Gold Mines of B.C. Ltd., New York-Alaska Gold Dredging Corp., Western Resources Ltd., Stikine Silver Ltd., Canex Aerial Exploration Ltd., Mount Washington Copper Co., Newmont Mining Corp., Kalco Valley Mines Ltd., Texas Gulf Canada Ltd., May-Ralph Resources Ltd., Ryan Exploration Ltd. (“U.S. Borax”), Kerrisdale Resources Ltd., Consolidated Stikine Silver Ltd., International Corona Corp., Homestake Canada Inc., and Barrick. Work conducted during this period included prospecting, geological mapping and reconnaissance, rock, stream, sediment, and soil geochemical sampling, trenching, surface geophysical surveys (electromagnetic (“EM”), very low frequency (“VLF”), ground magnetic/VLF-EM, induced polarization, seismic refraction, University of Toronto electro-magnetic system), borehole geophysics (frequency domain EM) core drilling, exploration adit and underground development, petrography, and mining studies.

Underground mining operations were conducted from 1994 to 2008. From 1995–2006, ore was direct-shipped after blending and primary crushing. From 1998 to closure in 2008, ore was also milled on site to produce a shipping concentrate.

Skeena has completed geological mapping, soil and grab sampling, rotary air blast and core drilling, an airborne light detection and ranging (“LiDAR”) and photo acquisition survey, Mineral Resource and Mineral Reserve estimation, metallurgical testwork, environmental testwork and supporting studies, and mining studies. A preliminary economic assessment was completed in 2019, a pre-feasibility study in 2021, and a feasibility study in 2022.

Geological Setting and Mineralization

The Eskay Creek deposit is generally classified as an example of a high-grade, precious metals-rich epithermal volcanogenic massive sulphide (“VMS”) deposit; however, it has also been suggested to be an example of a subaqueous hot spring gold– silver deposit.

The Eskay Creek Project is located along the western margin of the Stikine Terrane, within the Intermontane Tectonic Belt of the Northern Cordillera. It is hosted within the Jurassic rocks of the Stikinia Assemblage at the stratigraphic transition from volcanic rocks of the uppermost Hazelton Group to the marine sediments of the Bowser Lake Group.

In the Eskay Creek Project area stratigraphy comprises an upright succession of the Lower to Middle Jurassic Hazelton Group, including andesite, marine sediments, intermediate to felsic volcaniclastic rocks, rhyolite, contact mudstone (host to the main Eskay Creek deposits) (“Contact Mudstone”), and basaltic/andesitic sills and flows. This sequence is overlain by mudstones and conglomerates of the Bowser Lake Group.

Several styles of stratiform and discordant mineralization are present at the Eskay Creek Project, defined over an area approximately 1,400 m long and as much as 300 m wide. Distinct zones have been defined by variations in location, mineralogy, texture, and precious metal grades.

Stratiform-style mineralization is hosted in black carbonaceous mudstone and sericitic tuffaceous mudstone of the Contact Mudstone, located between the footwall Eskay Rhyolite member and the hanging wall Willow Ridge andesite unit. The stratiform-hosted zones include the 21A, 21B, 21Be, 21C, 21E, and North Extension (“NEX”). Stratigraphically above the Contact Mudstone, and usually above the first basaltic sill, the mudstones also host a localized body of base metal-rich, relatively precious metal-poor, massive sulphides referred to as the Hanging Wall (“HW”) Zone. Stratabound-style mineralization is also hosted stratigraphically below the Rhyolite and is hosted within the Lower Mudstone, Dacite, Even Lower Mudstone and Footwall Andesite, in the 23 Zone (formerly Lower Package Zone).

Stockwork and discordant-style mineralization at Eskay Creek is hosted in the Rhyolite within the PMP, 109, 21A, 21B-, 21Be, 21C, 21E, water tower (“WT”), and 22 Zones. Gold and silver occur as electrum and amalgam while silver mainly occurs within sulphosalts. Precious metal grades generally decrease proportionally with a decrease in total sulphides and sulphosalts. Clastic sulphoside beds contain fragments of coarse-grained sphalerite, tetrahedrite, and lead–

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sulphosalts, with lesser freibergeite, galena, pyrite, electrum, amalgam, and minor arsenopyrite. Stibnite occurs locally in late veins, as a replacement of clastic sulphides, and appears to be confined to the central, thickest part of the deposit, suggesting a locus for late hydrothermal activity. Cinnabar is rare and is found associated with the most abundant accumulations of stibnite. Barite occurs as isolated clasts, in the matrix of bedded sulphides and sulphosalts, and also as rare clastic or massive accumulations of limited extent. Barite is more common towards the north end of the deposit.

The Eskay Creek deposit retains exploration upside, along strike and at depth, in particular the potential to identify well-defined, mineralized syn-volcanic feeder structures that propagate through the volcanic pile.

Deposit Types

The Eskay Creek deposit is generally classified as an example of a high-grade, precious metals-rich epithermal VMS deposit; however, it has also been suggested to be an example of a subaqueous hot spring gold– silver deposit.

Features that would classify the Eskay Creek deposit as a VMS deposit include:

Features that would classify Eskay Creek as a subaqueous hot spring gold–silver deposit include:

See Table 8-1 – Deposit Type Features, of Technical Report for summary of the key features of each deposit type.

Exploration Programs

A summary of the exploration programs completed by Skeena from 2018 to 2022 are as follows:

2018 – Grids and Surveys

McElhanney Consulting Services Ltd. of Vancouver, B.C. flew an airborne LiDAR and photo acquisition survey in December 2018. The resulting topography map was compiled to 0.1 m accuracy.

LiDAR and photo acquisition were collected simultaneously with equipment co-mounted on the sampling aircraft. Sixty flight lines comprising 539-line kilometres were completed, covering the 100 km2 survey area.

2019 – Mapping and Grab Sampling Program

In mid-October 2019, geological mapping and grab samples were collected by Skeena geology staff in the Tom MacKay area, located approximately 2.2 km south of the 22 zone. Historical drill holes in the adit area contained anomalous gold values primarily within felsite which generally lies subvertical, dipping towards the east. The purpose of the program was to determine the relationship of the felsite dykes to the Eskay Rhyolite and collect rocks for whole rock geochemistry analysis.

In August 2019, geological mapping and grab sampling was carried out on the Tip Top and Eskay porphyry targets, located 700 m east of the 21 zone deposits. The Eskay Porphyry is a monzodiorite exposed in the core of the Eskay

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anticline, intruding into the footwall andesite. The Tip Top prospect is located along the same structural trend towards the southwest.

2020 – Geophysics

During 2020, Dias Geophysical Limited carried out a 3D direct-current resistivity and induced polarization survey over an approximately 5 km2 area that covered the axis of the Eskay Creek anticline from the Bowser Basin south to the Tom MacKay Zones using the DIAS32 system in the UTM zone 9N WGS84.

Dias Airborne Limited of Saskatoon flew an airborne magnetic gradiometry survey in 2020 using the QMAG full tensor magnetic gradiometer (FTMG) system. Approximately 1,060 line kilometres on 40 m line spacing were completed, which included 965 km of survey lines and 95 km of tie lines.

2021 – Eskay Rift-Basin Reconstruction and Targeting Project

From April 19 through May 3, 2021, relogging of diamond drill core was undertaken to establish an informal stratigraphy for strata that host the Eskay deposits.

Relogging of drill core and resulting graphic logs were completed for 26 representative drill holes totalling approximately 7,439 m. Eighty-nine samples were collected for whole rock analysis to characterize lithofacies and alteration types.

2021 – Geochemical Soil Sampling Program

Inherited soils data collected by previous operators demonstrated strong correlations between Au-Ag mineralization exposed at surface and B-Horizon Au soil anomalies. Unfortunately, the historical soils coverage was discontinuous across the property, particularly along the eastern limb of the Eskay anticline. In addition, the data collected by previous operators is poorly documented, generally lacks any quality assurance/quality control checks and is therefore of uncertain quality.

During the summer of 2021, Skeena collected 4,367 soil samples. The soil sampling program covered the majority of the lease boundaries, apart from areas defined as Bowser Basin geological units. The sampling entailed 116 line kilometres and was completed on a systemic 25-m x 100-m grid. Given the surficial footprint criteria for a near surface bulk tonnage target, these soil grid parameters permitted adequate coverage to detect an economic target.

2021 – Regional Mapping and Grab Sampling

From June through August 2021, Skeena collected 2,296 rock samples throughout the property, apart from areas defined as the Bowser Basin geological unit, to assist in the characterization of the lithofacies and alteration types. In addition, geological field mapping and prospecting activities were completed over the entirety of the property with additional focus on geochemical anomalies reported in historical soil grids, grab rock samples and diamond drilling. The samples were collected to ensure coverage at outcrops that had no previous data recorded nearby. The most mineralized or altered parts of the outcrops were sampled.

Exploration Potential

The Eskay Creek deposit retains exploration upside, along strike and at depth, in particular the potential to identify well-defined, mineralized syn-volcanic feeder structures that propagate through the volcanic pile.

The underexplored Lower Mudstone is situated about 100 m stratigraphically below the better explored Contact Mudstone and represents a horizon with potential to host similar exhalative style mineralization. Prospect ranking is influenced by areas where known synvolcanic feeder structures intersect this unit, as these locales will offer the highest potential for development of additional exhalative style mineralization.

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Due to limited legacy exploratory drilling in the area between the 21A and 22 Zones, additional opportunities exist to discover and delineate near-surface, Rhyolite- and/or Dacite-hosted feeder mineralization.

In 2022, the Eskay Deeps Zone was identified, at about 850 m depth, and is hosted entirely within altered Rhyolite breccias, located approximately 4 m below a marker bed of thin (<1 m), unmineralized Contact Mudstone. This zone is a new occurrence of Rhyolite-hosted gold–silver mineralization in the Eskay Deeps zone, which has many analogies with the known Eskay Creek deposits (stratigraphic sequence, mineralization and alteration styles, geochemical signature).

The discovery supports that the strike extension of the entire Eskay Creek Rift north of the NEX Zone has been offset to the northwest of the previously-assumed trend, and that there is significant potential, based on geophysical data, lithogeochemical, and structural studies, for this area to host feeder-style mineralization.

Skeena Drilling Program

Surface drilling has been carried out by multiple operators, with the first drilling on the property by Unuk Gold in 1934. Between 1934 and 2004, 1,655 surface core drill holes (377,667.1 m) were drilled.

Six underground core holes (224.64 m) were drilled in 1964 at the Emma adit, and 6,149 underground core drill holes (317,381.3 m) were completed from 1991 to 2008.

From 2018 to 2022, Skeena drilled 1,101 core surface holes (183,440.54 m), as summarized in Table 1-1. No underground drilling has been undertaken to date. A program of 20 rotary air blast (RAB) holes (410.03 m) were completed at Albino Lake, a historical mine rock storage facility, in 2021.

The Mineral Resource estimate is based on 8,684 core holes (834,824 m). Drill holes from south of 8250 N (227 core holes) and Albino Lake (20 RAB holes) are not used in estimation. No drill holes from the in-progress 2023 drill campaign are used in estimation. The 2023 drilling program began in late June with 27 planned holes (15,700 m) to drill the Eskay Deeps area and 22 Zone. This drill program is currently in progress. As of October 31, 2023, 25 holes were drilled.

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Table 1-1: Summary Table of Core Drilling Undertaken by Skeena

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Sampling, Analysis and Data Verification

Sampling and Analysis

Laboratories used for sample preparation and analysis during legacy programs, where known, include: Independent Plasma Laboratories (IPL; independent, accreditations not known), the Eskay Mine laboratory (not independent, not accredited), Bondar Clegg (independent, ISO 9002), and Acme Analytical (Acme; independent, ISO 9001:2000).

Skeena used the ALS sample preparation facility in Kamloops, which is independent and accredited. Analysis was completed at the ALS facility in Vancouver (“ALS Vancouver”), which holds ISO17025 accreditation for selected analytical methods. Both laboratories are independent of Skeena. SGS Canada, located in Burnaby, BC (“SGS”), was used to independently test pulp duplicates and a select number of standards. SGS holds ISO 17025 accreditations for selected analytical techniques. SGS is independent of Skeena.

The Eskay Creek mine initiated quality assurance and quality control (“QA/QC”) measures into their sample stream in 1997. With progressive years the QA/QC protocol became more comprehensive and detailed. Skeena implemented a formal QA/QC program from the inception of their 2018 Phase 1 drilling program, consisting of blanks, duplicates and standard reference materials (“SRMs”). SRMs and blanks were monitored when batches of assay data were first received. If analyses were outside of the acceptable ranges after checking for data entry errors, then repeat assay were requested. The laboratory was instructed to retrieve five pulp samples before and after the QC failure. Prep and pulp duplicate data were also monitored, with Skeena reporting any concerns to the laboratory manager.

Skeena implemented formal QA/QC programs for all phases of drilling between 2018 and September 2021. In total, five drilling phases were completed, including 2018, 2019, 2020 Phase 1, 2020/2021 Phase 2, and 2021 Phase 3. For the purposes of reporting, QA/QC is discussed by year and in some cases, drilling phases overlap years. The close-out date of the latest database is September 10, 2021, and QA/QC validations are only relevant up to and including the 2021 Phase 3 drilling program.

Legacy sample preparation and analytical methods varied by laboratory and over time, and typically consisted of crushing to -10 mesh, followed by pulverizing to -15, or -150. Skeena’s samples were commonly crushed to -10 mesh then pulverized to -200 mesh.

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Analytical methods used during the Skeena programs included:

The Eskay Creek mine initiated quality assurance and quality control (QA/QC) measures into their sample stream in 1997. With progressive years the QA/QC protocol became more comprehensive and detailed.

Skeena implemented a formal QA/QC program, consisting of included submission of blanks, certified reference materials (standards), duplicates, and completion of a check assay program. All quality control issues were immediately addressed, and repeat batches were conducted if questionable data was encountered. Quality control reports documented the type, quantity, and outcome of the quality control assessment, all of which show good performance and assay data integrity.

Skeena implemented formal QA/QC programs for the 2018–2023 drill campaigns. These included submission of blanks, certified reference materials (standards), and completion of a check assay program. In addition to the Skeena-introduced QC samples, ALS Vancouver inserted their own independent check samples.

The material used for the blanks was marble garden rock obtained from Canadian Tire in Smithers, BC. Blanks were inserted at a rate of approximately three blanks per 100 samples. Standards were purchased from either CDN Resource Laboratories in Langley, British Columbia, or Ore Research & Exploration Pty Ltd. (OREAS), through Analytical Solutions Ltd. in Ontario. An additional high-grade antimony CRM (Cd-1) was obtained from Natural Resource Canada in Ottawa, Ontario.

Standards were inserted at a rate of approximately five standards per 100 samples. Standards were selected to match the expected grade of the logged samples, with high-grade standards inserted where the geologist projected higher-grade material.

Duplicates could be either sample preparation or pulp duplicates. The preparation duplicate was a split that the laboratory takes from the reject material at a rate of one in every 50 samples. Pulp duplicates were inserted at the laboratory manager’s discretion.

Standards and blanks were monitored when batches of assay data were first received. Standard or blank control charts were routinely updated for the following elements: gold, silver, copper, lead, and zinc; other elements were analysed on an as needed basis.

Blanks were re-run when the assay value for the blank was >10 x the gold detection limit.

Control charts for standards were prepared using the acceptable value plus or minus three standard deviations, to provide the acceptable range. If analyses were outside of the acceptable range after checking for data entry errors, then repeat assays were requested.

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Where two or more consecutive standards were both biased high or low (<105% of the expected value or >95% of the expected value) repeat assays were requested. The laboratory was instructed to retrieve five pulp samples before and after the QC failure.

Data Verification

Data were manually checked for errors and gaps prior to database upload, and where issues arose, these were corrected. Data validation was undertaken by the Skeena site team under the supervision of the exploration managers. After the data were checked, they were imported into the GeoSpark database.

Regular reviews of data quality are conducted by the database manager and the director of resources and reserves prior to resource estimation to ensure there are no conflicting or incorrect entries (e.g., overlapping intervals, assays recorded beyond the end of hole, incorrect downhole surveys, collar coordinates, collar elevation and collar translation to mine grid etc.). All identified errors were corrected.

Skeena also employes Qualified Persons in data verification. See Table 12-1 – External Verification of the Technical Report for a summary of external verifications programs completed on historical data and in support of technical reports on the Eskay Creek Project.

Mineral Processing and Metallurgical Testing

Previous Programs

As part of the Eskay Creek Project’s 2019 preliminary economic assessment and 2021 pre-feasibility study, testwork programs were completed by Blue Coast Research in Parksville, British Columbia and Base Metallurgical Laboratories Ltd. in Kamloops, British Columbia respectively. The outcome of this work was a modified circuit design, incorporating two stages of milling and flotation – or an MF2 flowsheet. This avoided overgrinding softer minerals present at different levels in the Eskay Creek samples as well as isolating a slimes fraction to a separate flotation circuit.

The 2019 program was completed on a limited number of samples from 21A, 21C and 22 ore zones while the 2021 program included a wider range of samples for variability testing and from a greater number of ore zones.

Testwork into cyanide leaching, gravity recovery and concentrate hydrometallurgical retreatment resulted in these options being excluded from the final flowsheet, which generates a saleable precious metal concentrate from both coarse and fine flotation circuits.

Work was also completed to estimate regrind mill power requirements and dewatering of tailings and final concentrate.

2022 Feasibility Study Program

The FS program was completed by Base Metallurgical Laboratories Ltd. over the period June 2021 to August 2022, focusing on FS flowsheet conditions. A bulk sample was processed through a pilot plant to generate sufficient sample mass for regrind mill evaluation and additional thickener and filter testing. A larger variability sample program was tested to generate results for recovery modelling. Two main lithologies: Rhyolite and Hanging Wall/Mudstone were modelled separately due to their different response.

Additional comminution testing was conducted on both Rhyolite and Mudstone samples as well as regrind mill specific energy testing (both “HIGmill” and “IsaMILL”) was done on samples of rougher concentrate and deslimed rougher tailings. Dewatering tests on the final concentrate identified the need to supplement drying after pressure filtration for some of the samples, in order to reach transportable moisture limit levels of water content.

The variability testing provided insight into methods to mitigate cleaner circuit losses, particularly on Hanging Wall/Mudstone samples. Repeat cleaner tests were conducted on several samples from the variability testing to demonstrate improved metallurgical performance when grind size targets and collector addition rates were tightly

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controlled. After this improved repeat testing, locked cycle tests were conducted on several samples including a year 1-5 composite to confirm closed circuit performance for recovery modelling and equipment sizing.

For mine planning purposes, a series of recovery models were developed from the 2022 FS variability results, for each major rock type. The recovery equations developed are acceptable for use in the MRMR estimates and mine plan used in financial modelling. Within each rock type, concentrate quality could be reliably estimated from feed grades and was found to vary based on gold and sulphide mineral contents, as well as lithology. The recovery models developed were based on performance at different cleaner circuit operating points for each mining period in order to maximize NSR.

With higher-grade material processed in the first three years, although arsenic, antimony, and mercury levels are expected to be elevated in the final concentrate, the concentrate saleability is not impacted. Grades of gold in concentrate are expected to be 60 g/t in Year 1 and decrease to 18 g/t in Years 8 and 9. Overall gold recovery for the first nine years is 84% to a 37g/t Au concentrate. Silver recoveries average 88% over the mine life, with concentrate grades of 1,024 g/t Ag. Sulphur levels in final concentrates are expected to be between 18% and 26% at selected cleaner operating points.

2023 Feasibility Study Program

Testwork was conducted by, or supervised by, the independent metallurgical facilities Blue Coast Research, Parksville B.C., and Base Metallurgical Laboratories, Kamloops, B.C., in the period 2018–2023. Tests included: mineralogy, comminution, open and locked cycle flotation, whole ore leaching, gravity, variability, bulk sample, concentrate treatment, solid–liquid separation, filtration tests, and reagent selection and refinement.

The proposed process flowsheet has been refined and modified over time, with the current preferred option representing a conventional flowsheet consisting of a single rougher flotation stage and a single cleaning circuit producing a high-grade gold–silver concentrate.

The 2023 Feasibility Study (the “2023 FS”) uses information from earlier programs in support of flowsheet design and simplification. The 2023 testwork was based on three large composite samples from drill core, representing different Mudstone to Rhyolite ratios that would be encountered at different phases of the proposed mine life.

Detailed mineralogy was completed for each of the 2023 composites including mineral abundance and sulphide liberation analysis. Mineralogy between the composites was relatively similar.

Comminution tests were completed prior to the 2023 FS, and consisted of determination of SG, abrasion index, drop weight index, Bond rod work index, Bond ball mill index testwork, and SMC comminution tests. 2023 testwork consisted of IsaMILL “signature plot” testing for assessing the specific energy required for fine grinding. The signature plot provides a relationship between product size and energy input for mill sizing.

A significant volume of flotation testwork was completed during the four earlier stages of metallurgical evaluations using materials from the Eskay Creek deposit. The 2023 FS adopted a significant change to the flotation process, which consisted of the introduction of high addition rates of flotation collector addition in the primary grinding mill. Introducing collector in the grinding process allows for better adsorption onto sulphide minerals in the face of competing organic minerals in the ores. This allowed for process circuit optimization opportunities.

A number of open circuit flotation tests were completed to confirm a relationship between primary grind particle size distributions and expected flotation recovery for gold and sulphur. A range of different chemistries were trialed. Each of the 2023 composites, along with a Rhyolite composite, underwent lock cycle tests under different conditions. The lock cycle results demonstrate that the gold recovery values are expected to be consistent at 80–82% of contained gold, although with different concentrate grades.

Recovery forecasts will vary over the proposed life of mine (“LOM”) plan, based on the proportion of lithologies planned to be treated each year, and the head grades. Gold and silver recovery rates are expected to range from 80.8–84.2%

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with an average LOM recovery of 83.0% for gold, and range from 89.0–94.2% with an average LOM recovery of 90.5% for silver.

Mineral Resources Estimates

The grade estimate was constructed using a block size of 5 x 5 x 2.5 m.

A lithostructural model was constructed that included lithologies, major faults, and intrusive units. A total of 103 mineralization solids were created, consisting of 14 high-grade solids and 89 lower-grade solids. The mineralization solids were separated into major fault block and historical mining zones.

The high-grade solid used to constrain and restrict the influence of the previously-mined extremely high-grade drill hole samples used a 15 g/t gold equivalent (“AuEq”) grade shell modelled in the orientation of the Contact Mudstone.

Estimation domains were coded successively based on the following division scheme: location within the historical mining area; dominant lithology type; position within the litho-structural domain; and location within the high-grade restriction domain.

A 0.20 m geotechnical exclusion zone around the underground workings was used to deplete the final resource estimate, using 1 x 1 x 1.25 m sub-blocks.

Capping was applied to all domains before compositing. Gold capping ranged from 115–1,700 g/t Au in the high-grade domains and 2.4–350 g/t Au in the lower-grade domains. Silver capping ranged from 200–60,000 g/t Ag in the high-grade domains and 30–22,000 g/t Ag in the lower-grade domains. Samples were composited to 1 m lengths.

Variograms were used to assess for grade continuity, spatial variability in the estimation domains, sample search distances, and kriging parameters.

Due to the folded nature of the deposit, dynamic anisotropy was selected as the preferred estimation method for the 21A, 21B, 21C, 21Be, NEX, HW and LP Zones because adjustments in each block could be made in relation to the presiding mineralization trend. The anisotropy direction was defined from the base of the Contact Mudstone.

Specific gravity (“SG”) values were determined based on a combination of lithology type and zone, with the mean SG value selected from each zone, or, if outside of the zones, then average SG values within lithology type were used. Where there were fewer than 10 samples, SG was determined by averaging the SG of zones in that lithology. Values ranged from 2.6–3.1.

Ordinary kriging (“OK”) was used to estimate gold and silver in all domains, apart from two zones in the WT Zone, which were estimated by inverse distance weighting to the second power (“ID2”). Gold and silver within the mineralization domains were estimated using three passes with increasing search radii based on variogram ranges. Hard boundaries were honoured between all solids.

Validation included visual inspection in plan and sectional views, comparison of OK estimates with ID2 and nearest-neighbour methods, and swath plots. No major biases were noted.

For mineralization in domains exhibiting good geological continuity using adequate drill hole spacing, the QP considers that blocks estimated during the first estimation pass using a minimum of four drill holes, an average distance of <18 m and a kriging variance of <0.4, to be classified as the measured category. mineralization in domains exhibiting good geological continuity estimated during Pass 1 with a minimum of three drill holes were classified as indicated. Blocks estimated during pass 1 and 2 using a minimum of two drill holes and an average distance of <100 m were classified in the Inferred category.

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Epithermal (mercury, arsenic, antimony), base metal (lead, copper, zinc), and metallurgical (iron and sulphur) elements were estimated to support metallurgical evaluations. A high degree of variability of the epithermal elements exists between the different zones and rock types, and elevated concentrations occur in localized zones/pods.

Mineralization considered potentially amenable to open pit mining methods was confined within a pit shell. A pit constrained cut-off of 0.7 g/t AuEq was selected for reporting the estimate, based on the equation:

A portion of the deposit beneath the open pit shell may be amenable to drift-and-fill underground mining methods, and was confined within potentially mineable shapes. A cut-off of 3.2 AuEq was selected for reporting the estimate, based on the equation:

Mineral Resource Statement

Mineral Resources are reported insitu, using the 2014 CIM Definition Standards. Mineral Resources are reported inclusive of those Mineral Resources converted to Mineral Reserves.

Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. Mineral Resources have an effective date of 20 June, 2023.

The Qualified Person for the estimate is Ms. Terre Lane, MMSA QP, a GRE employee.

Mineral Resources considered potentially amenable to open pit mining methods are summarized in Table 1-2. Mineral Resources considered potentially amenable to underground mining methods are summarized in Table 1-3. The Mineral Resources considered potentially amenable to underground mining methods are reported exclusive of the estimated Mineral Resources potentially amenable to open pit mining.

Factors that may affect the estimate include: changes to long-term metal price assumptions; changes in local interpretations of mineralization geometry and continuity of mineralized zones; changes to the density values applied to the mineralized zones; changes to geological shape and continuity assumptions; potential for unrecognized bias in the assay results from legacy drilling where there was limited documentation of the QA/QC procedures; changes to the input values used to generate the AuEq cut-off grade; changes to metallurgical recovery assumptions; changes in assumptions of marketability of final product; changes to the conceptual input assumptions for assumed open pit operations; changes to the input assumptions for assumed underground operations; variations in geotechnical, hydrogeological and mining assumptions; changes to environmental, permitting and social license assumptions.

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Table 1-2: Mineral Resources Potentially Amenable to Open Pit Mining Methods

Notes to Accompany Mineral Resources Potentially Amenable to Open Pit Methods:

Table 1-3: Mineral Resources Potentially Amenable to Underground Methods

Notes to Accompany Mineral Resources Potentially Amenable to Underground Mining Methods:

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of US$100/t mined; processing cost of US$25/t processed; general and administrative costs of US$12/t processed; transportation and refining costs of US$18.5/oz Au and US$7/oz Ag; and a mining recovery of 95%.

Mineral Reserve Estimates

Mineral Reserves were estimated from Measured and Indicated Mineral Resources, assuming open pit mining methods. Inferred Mineral Resources within the mine plan were set to waste.

Pit designs were completed using the pseudoflow procedure in Geovia Whittle. Ultimate pits were generated using a revenue factor of one.

An NSR value of C$24.45/t (US$18.81/t) was used as the mill feed cut-off. NSR calculations are inclusive of all revenues for the gold concentrate. Revenues are based on contributions of both gold and silver metals. The NSR cut-off was used to flag ore and waste blocks and represents the preliminary process and site general and administrative (G&A) costs. The NSR is calculated using the following equation:

The open pit resource model was provided as a sub-blocked model with 5 x 5 x 2.5 m parent blocks, and 1 x 1 x 1.25 m sub-blocks around the underground workings.

Mineral Reserve Statement

Mineral Reserves are reported at the point of delivery to the process plant using the 2014 CIM Definition Standards, and have an effective date of 14 November, 2023.

The Qualified Person for the estimate is Ms. Terre Lane, MMSA QP, a GRE employee.

The estimate is provided in Table 1-4.

Table 1-4: Mineral Reserves Statement

Notes to Accompany Mineral Reserves Table:

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Factors that may affect the estimate include: metal price and exchange rate assumptions; changes to the assumptions used to generate the gold equivalent grade cut-off grade; changes in local interpretations of mineralization geometry and continuity of mineralized zones; changes to geological and mineralization shapes, and geological and grade continuity assumptions; changes to offsets around the old underground workings and additional knowledge related to exact locations of the mined-out voids; density and domain assignments; changes to geotechnical assumptions including pit slope angles; changes to hydrological and hydrogeological assumptions; changes to mining and metallurgical recovery assumptions; changes to the input and design parameter assumptions that pertain to the open pit shell constraining the estimates; assumptions as to the continued ability to access the site, retain mineral and surface rights titles, obtain and maintain environmental and other regulatory permits, and obtain the social license to operate.

Operations will need careful water management, effective execution of water diversion to allow access to the northern portion of the pit during later pit phases, and management of snow and rain conditions.

Mining Operations

Geotechnical Considerations

A geotechnical model that characterizes the rock mass conditions, structural geology, hydrogeology, and seismicity of the open pit area was developed and is used as the basis for the open pit geotechnical assessment. The rock mass model is based on data from drill hole logging, laboratory testing, the Eskay Creek geology model and relevant background reports. A total of 11 geotechnical units were identified.

Inter-ramp scale kinematic analyses were first performed in each structural domain to identify plausible planar, wedge, and toppling instability modes formed by the combination of discontinuities and the pit wall orientation. Based on the results, the structural domains in the pit wall were subdivided into “kinematic sectors” with similar kinematic controls. Bench-scale kinematic analyses were also completed to estimate the effective bench face angles that can be expected during mining.

Recommended inter-ramp slope angles range from 26–51°. Maximum inter-ramp stack heights should be limited to approximately 80 m in toppling controlled sectors and 120 m in other sectors. Inter-ramp stacks should be separated by geotechnical berms or ramps that are a minimum of 30 m wide. Double benches, of 20 m in height, are likely achievable in all sectors, with recommended catch bench widths ranging from 12.7–37.5 m, depending on the sector.

The slope design criteria assume that controlled blasting will be implemented. A program of scaling bench faces and cleaning accumulated material from bench toes is also required. Active slope depressurization will be required in the north and southeast walls of the north pit to meet the design acceptance criteria in these slopes.

Hydrogeological Considerations

Historic and recent groundwater investigations illustrate elevated hydraulic conductivity associated with the N-S trending faults in the proposed mining area. However, not all the fault systems are conductive; for example, the E-W trending riedel shears are considered to have similar conductivity to the country rock or lower conductivity, potentially

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acting as barriers (aquitards) to flow. The former underground mine operators reported rapid response to precipitation events with increased mine inflows potentially resulting from the conductive faults, but potentially also from increased fracturing from mining activities, and inflows through unsealed exploration boreholes. Higher groundwater recharge in the former underground mine area is therefore expected compared to in undisturbed areas.

Pit stability can be managed by progressive dewatering of the ground behind the pit slope with vertical or horizontal boreholes. The hanging wall (andesite and mudstone) rocks are rated as moderately conductive (calibrated K = 5E-07 m/s) compared to the footwall (rhyolite) rock (calibrated K = 5E-08 m/s) and will likely dewater more easily than the rhyolite, which reportedly has high fines content and drains poorly. The rhyolite will generally occupy lower elevations in the final pit extent; however, rhyolite would be present on the south and east pit highwall and may be susceptible to failure if pore-water pressure builds up on fault planes. The planned ultimate pit bottom will be at 714 masl, and therefore only about 50 m of flooded working will require dewatering. However, dewatering the underground workings in advance of mining may promote overall pit wall depressurization.

The hydrological cycle implies a short period of groundwater recharge associated with spring melt and fall rain; a bimodal hydrograph with peaks in May / June and then in October / November. The average annual variation in groundwater levels is 3.5 m (range 0.5 m – 10 m). Groundwater levels in the pit area are generally deep: 30 m - 60 m and thought to be due to the active pumping that maintains the water level in the underground workings around 765 masl. Groundwater flux in the mining area is predominantly to the east, toward Ketchum Creek with only 10% of flow to Tom McKay Creek. On the western margin of the proposed waste rock storage area, groundwater depths are shallow (2-4 m) and the groundwater flow direction predominantly toward Tom McKay Creek. Groundwater depths north of Tom McKay Lake range from 4-9 m. There is hydraulic containment throughout most of the extent of the proposed tailings storage area, except in the south where modelling shows a westerly flow path to Harrymel Creek. The extent to which this flow path is cut-off by north-south fault is unknown and the subject of further investigation. Mine designs incorporate removal of conductive overburden materials (e.g., beneath the proposed tailings storage facility dams) and capture of shallow seepage from mine waste facilities in seepage collection ponds (e.g., in the waste rock storage area). Monitoring wells are being installed in groundwater flow paths between mining infrastructure and creeks to measure the potential effects to water quality.

Mine Plan

The mine plan assumes conventional open pit mining methods and the use of conventional equipment. Two open pits are planned, a larger northern pit, and smaller southern pit.

Pit designs were developed for the north and south pit areas. The initial phases were designed for the purpose of obtaining a technical sample and necessary non-acid generating (“NAG”) waste material to create supporting infrastructure. The north pit will consist of an additional six main phases, while the south pit will consist of a single small phase. The pit optimization shells used to determine the ultimate pits were also used to outline areas of higher value for targeted early mining and phase development.

The south pit is significantly smaller than the north pit, and is likely to be mined near the end of the mine schedule. The south pit generally has harder rock and lower gold grades. Rhyolite is the dominant rock type that will remain in the mined-out pit walls before reclamation.

A total of 11 pit phases are planned, for a nine-year mine life, with a three-year pre-production period. Mining will be initiated in the north pit starting with phase 1 and will continue sequentially by phase through to the last northern pit phase, phase 10. The south pit (phase 11) will be mined when all the pit phases in the north pit are complete.

Mine planning indicates that the northern end of the open pit will intersect Tom MacKay Creek requiring the provision of a water diversion channel to re-route flowing water along a bench of the Phase 9 pit before re-entering the existing Tom MacKay Creek downstream.

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NAG and potentially acid generating (“PAG”) waste material contained in the ultimate pits are estimated at about 166.50 Mt and 151.39 Mt, respectively. The total amount of waste within the pits in the mine plan is 317.89 Mt. PAG waste will be sent to the TMSF for subaqueous disposal. NAG waste will be stored in the mine rock storage area (“MRSA”).

Two ore stockpiles will be used:

Grade control will be completed using a fleet of RC drill rigs.

The mining equipment selected to achieve the planned production schedule is conventional open pit mining equipment, with additional support equipment required for snow management.

Drilling will be completed with down-the-hole hammer drills with 171 mm bits. Pre-production mining will be completed with 75 ton and 90-ton class excavators, loading into 60-ton class articulated dump trucks. Production mining will be completed with 200-ton class excavators and 400-ton class hydraulic shovels loading 150-ton class haul trucks. Three 354 horsepower bulldozers will be dedicated to supporting the loaders in the pits. The support equipment fleet will be responsible for road, pit, and dump maintenance requirements and will provide snow removal during winter months. Snow blowers and snowplows were included in the fleet.

Skeena plans to execute selective mining of ore on three flitches within each 10 m high operating bench, by using 200-ton class excavators with buckets that are substantially smaller than the 5 x 5 x 5 m mine planning model blocks. During mine operations, ore and waste boundaries will be delineated by a grade control model that uses a smaller block size, which will be defined by the SMU that is achievable with the selected excavator bucket size. The grade control model will be developed from assays obtained from RC drilling to accurately define ore and waste contacts.

Processing and Recovery Operations

The processing plant facilities will consist of crushing, grinding and flotation circuits designed to liberate and recover gold from the run-of-mine (“ROM”) ore. Flotation concentrate will then be thickened, filtered, dried, and stockpiled at the process plant prior to loading into haul trucks for transport.

The Eskay Creek Project will be constructed in two distinct phases, as follows:

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The process plant building has been sized to accommodate the year 6 expansion.

Electrical power will be provided to the process plant building from the main substation at 13.8 kV. The SAG mill, ball mill, tertiary mill and regrind mills will all operate on 13.8 kV motors. A stepdown transformer will provide 4160V and 600 V power to the other motors. The initial installed power for the processing plant will be 32.4 MW with an anticipated power draw of 25.3 MW during operations. The expansion installed power in Year 6 will be 33.2 MW, with an anticipated power draw of 26.1 MW.

Fresh water will be sourced from groundwater wells. Process water will consist predominantly of mine dewatering, contact water, concentrate thickener overflow and, TMSF reclaim water.

Consumables will include: collector (PAX); frother (methyl isobutyl carbinol); flocculant (anionic); crushing liners and wear parts; and grinding media.

Infrastructure, Permitting and Compliance Activities

The proposed Eskay Creek Project infrastructure will include:

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The access road is currently in good condition and is maintained on a continuous basis and is providing the main access to existing facilities at camp KM58 and KM59 (historical camp). During construction, this road will be locally re-routed in some limited areas between the future gate-house and historical camp, to accommodate tie-ins to newly constructed roads, or expanded footprint of future infrastructure, however access will be continuously maintained throughout the construction to facilitate optimal use of the existing facilities.

Soil and overburden stockpiles will be constructed adjacent the TMSF haul road. PAG waste rock and overburden will be temporarily stockpiled on surface during the pre-production period for material generated through initial pioneering of the TMSF and technical sample haul roads prior to access being available to the TMSF for subaqueous deposition. All PAG material will be relocated to the TMSF by the end of the pre-production period.

The MRSA will be located adjacent to, and immediately west of, the open pits within the Argillite Creek drainage.

The TMSF is an existing tailings storage facility located approximately 4.6 km southwest of the deposit area. Approximately 0.6 Mt was deposited subaqueously in the facility from 2001 to 2008. The deposited tailings were discharged as a slurry and have settled at a depth of approximately 30 m below the surface of the water.

Dams will be constructed at the north and south end of the TMSF to accommodate the storage of tailings and waste rock, as well as provide storage capacity of site contact water to be treated at the water treatment plant. The dams will be constructed in stages over the life of mine, with an initial starter dam constructed at the north of the facility to provide storage for tailings from the first year of mill operations, and PAG waste rock generated during pre-production and Year 1 of operations.

The TMSF has been designed to store 38.6 Mt of tailings and 152.8 Mt of PAG waste rock as well as site contact water, with additional capacity maintained above the minimum storage requirements for storm inflows.

PAG waste rock will be managed in the north end of the facility. Tailings slurry will be deposited in the south end of the TMSF at a nominal solids content of approximately 21% solids by weight. The TMSF design is based on an operating mine life of 12 years, and a total storage capacity of 191.4 Mt of tailings and waste rock. The TMSF has a storage capacity of 118.8 Mm3 which includes approximately 33.7 Mm3 of tailings, 75.6 Mm3 of PAG waste rock, 8.5 Mm3 of water storage capacity, and 1 Mm3 of stormwater management capacity for the environmental design flood (1-in-1,000-year, 24-hour precipitation event). Larger flood events will be managed through an emergency discharge spillway which will route storm flows to Tom MacKay Creek.

Site water management during construction involves controlling contact water runoff from the temporary PAG stockpiles, runoff from the roads, drawdown of the TMSF to prepare for construction of the TMSF dams, and erosion and sediment control measures around active construction areas. Site water management for operations involves controlling surface water around the Eskay Creek Project site. Water in contact with mine workings or disturbed areas

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(groundwater inflows and meteoric inputs to the open pits; runoff from waste rock, ore stockpiles, quarry areas, tailings, laydown areas, etc.) is considered contact water. Non-contact water is runoff from undisturbed areas, including those areas that are being diverted.

A water treatment plant will treat mine-impacted water originating from the TMSF, open pits and the MRSA prior to discharge to the environment. Due to high flow rates, two separate treatment trains are planned for the plant. The water treatment plant is designed for a flow rate of 568 L/s and will operate year-round.

A mine-site water balance has been completed to support the design of the TMSF and the water treatment plant. The water balance indicates that the site will operate in an annual water surplus of approximately 560 L/s. Surplus volumes will be managed in the TMSF prior to treatment and discharge.

The existing camps at KM58 and KM59 (200-person combined capacity) and Forrest Kerr camp (160-person available capacity) will be used in Year -1 and the first half of Year -2. In Year -2, the 380-person permanent camp facility will be constructed, ready for occupancy in the second half of that year, and will be located at the Eskay Creek mine site east of the TMSF.

The Eskay Creek Project will connect to the provincial grid via the Coast Mountain Hydro-owned 287kV transmission line, 2L379. Power will be purchased from BC Hydro who will supply the power over 2L379. The point of interconnection on 2L379 will be near Volcano Creek where a transmission line tap exists for the Coast Mountain Hydro-owned Volcano Creek generating station. The Eskay Creek power system will be capable of supplying 48 MVA to the Eskay Creek substation which will cover the initial power demands and planned future expansion.

Standby diesel generators in weatherproof enclosures will be provided to supply critical process loads and life safety systems.

Environmental, Permitting and Social Considerations

A number of environmental studies were performed in support of the historical mining activities to support an application for a Mine Development Certificate. Additional environmental studies were completed in 1997 to support the proposed mill installation at the mine site (and again in 2000) to apply for a separate Environmental Assessment Certificate and listing under Schedule 2 of the Metal and Diamond Mining Effluent Regulations, to deposit tailings and waste rock in the TMSF. Environmental monitoring and routine reporting was completed during and after the historical operations. The Eskay Creek mine has been in care and maintenance since mining operations ceased in 2008, with ongoing site management and minimal waste generation.

Skeena commenced environmental, social, economic, historical and health baseline studies to reflect current environmental and social conditions in 2020. Where available and to provide context, pre-2020 data was reviewed and summarized for the current baseline studies and where suitable for the Eskay Creek Project, sampling sites used in earlier studies were re-visited to support an application for a new or amended Environmental Assessment Certificate.

Environmental Considerations

The Eskay Creek Project will be designed, constructed, operated, and decommissioned to meet all applicable provincial and federal environmental and safety standards, regulations, and permit conditions. Skeena will implement an environmental management system in advance of construction that defines the processes, resources, responsibilities, and specific management plans to ensure compliance. The existing site operates under an environmental management system which will be modified to meet the scope of the Eskay Creek Project during the permitting process and include ongoing monitoring, management steps, and reporting to relevant parties.

Site water management will be a critical component of project design, execution, operation, and closure. To mitigate the potential contamination of water from a variety of sources (air, land, and process), Skeena will develop a Water Management Plan and a Dust Control Management Plan that applies to all activities, in addition to numerous other

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plans as required by regulation or that have been identified through the development and mitigation measures informed by Tahltan mitigation strategies.

Closure and Reclamation Planning

For planning purposes, closure and reclamation strategies have been developed for each mine component. In accordance with the Mines Act permit, mine closure, reclamation and post-closure costs must be updated every five years or upon a major amendment to the mine plan to reflect current and projected site wide closure and reclamation liabilities to inform the reclamation security bond.

A closure cost estimate was developed to determine the estimated cost of implementing closure plans. Reclamation and closure costs include conventional closure (e.g., earthworks), long-term monitoring and maintenance, and water treatment activities. Closure, reclamation, and post-closure costs were calculated over a 100-year timeframe using an NPV analysis, beginning with scheduled closure and reclamation activities in 2040.

The total closure cost estimate, including water treatment, monitoring and maintenance, demobilization, engineering, and contingency is $174.8 M. At a 4% annual discount rate, the total discounted closure cost estimate in 2023 is $53.7 M.

Permitting Considerations

The Eskay Creek mine went through two Environmental Assessment processes in its history. For the proposed Project, Skeena will undertake a substituted process to amend an existing Environmental Assessment Certificate or obtain a new Environmental Assessment Certificate. The process to follow for the Environmental Assessment/Impact Assessment is being developed with the provincial and federal regulators, the Tahltan Nation and Skeena, based upon the legislative steps, criteria, and procedures. Skeena submitted a Detailed Project Description to the federal and provincial regulators and Tahltan Central Government on August 11, 2022, to initiate the second phase (Readiness Decision) of the Environmental Assessment process. A process order was issued by the BC government on April 18, 2023 which outlines the scope of the assessment and determines the application information requirements to be included in the application.

No technical or policy issues have been identified that would prevent obtaining the required project permits and approvals, given its long mining history, understanding and mitigation of environmental and social effects.

No permits for project commercial development will be issued before an Environmental Assessment Certificate is obtained. Consequently, Skeena will apply concurrently for permits within the environmental review process schedule for all permits. Strategies to expedite the permitting process and reduce the time to start construction are being examined. To that end a Process Charter was signed between Skeena, the BC government and the Tahltan Central Government in January 2023 outlining regulatory processes to be followed, efficiencies, risk mitigations and the development of joint work plans.

Skeena has identified the likely provincial and federal permits that must be approved prior to commencing construction or operational activities.

Social Considerations

Provisions for consultation with Indigenous Nations and the public are a component of the provincial and federal legislation for both the Environmental Assessment processes and permitting activities. Skeena is implementing an Engagement Plan for the Eskay Creek Project as required by the provincial and federal Environmental Assessment processes and meets the requirements of the Environmental Assessment process order. This plan provides a summary of Skeena engagement activities as well as serves as a guide for Skeena’s engagement activities with identified Indigenous Nations and stakeholders throughout the Environmental Assessment process.

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Ongoing and future engagement and consultation measures by Skeena are driven by best practices as well as Skeena’s internal company policies, and federal and provincial government requirements. Skeena diligently tracks and maintains records of all engagement activities and commitments therefrom.

The Eskay Creek Project is located within the traditional territory of the Tahltan Nation and the asserted territory of the Tsetsaut Skii Km Lax Ha. The historical environmental process and subsequent expansions included consultation with the Iskut Band, Tahltan Band, and the Tahltan Central Government.

Eskay Creek Project traffic will use Highways 37 and 37A which pass through the Nass Area and Nass Wildlife Area (as defined by the Nisga’a Final Agreement) and the traditional territory of the Gitanyow Nation. Skeena engages with Nisga’a and Gitanyow on matters of mutual interest.

Skeena will consult with the public and relevant stakeholder groups, including tenure holders, businesses, economic development organizations, businesses, and contractors (e.g., suppliers and service providers), and special interest groups (e.g., environmental, labour, social, health, and recreation groups), as appropriate.

Market Studies and Contracts

A market study for the LOM potential concentrate production, which took into account production and grade variation over time, was finalized by third-party consultants Deno Advisory in October 2023. This study forms the basis for the economic analysis in the Technical Report.

Typical treatment and refining charges for concentrate sales will depend on the concentrate type and grade.

The proposed Eskay Creek operation is expected to produce a high gold–silver grade concentrate with elevated levels of mercury, arsenic, carbon, and antimony. The concentrate is complex and will require a more measured marketing strategy.

Samples of the Eskay Creek concentrates, varying in antimony, arsenic, lead, zinc, gold, and silver grades, were sent to potential lead smelters and gold roasters during 2023. The exercise demonstrated that a diversified sales strategy could be implemented for concentrate sales; thereby reducing reliance on a single smelter or trader. Such a strategy could include varied sales to lead smelters, traders, blenders, and roasters.

China is the most likely destination for the majority of the concentrate production and the concentrate will currently meet the direct importation regulations, i.e., without the need for further blending. Skeena has received indicative bids from smelters and traders, ranging from a portion of the total production, to LOM production.

Skeena management used a combination of pricing used in other recently-published feasibility studies, long-term analyst prices, and the two-year and three-year trailing average gold and silver prices as of April, 2023 to establish the forecast pricing for the purposes of the 2023 FS. Mineral Resource and Mineral Reserve pricing was set at US$1,700/oz Au and US$23/oz Ag. Cashflow pricing was set at US$1,800/oz Au and US$23/oz Ag.

At the Technical Report effective date, no contracts had been entered into. Concentrate sales are likely to be a mix of long-term and spot contracts, to ensure a diversified sales strategy. It is likely that the longer-term contracts will be a type of evergreen contract, which continue after the initial term, but with periodic renegotiation of terms and conditions. Terms of sale for a term contract between mining companies and smelters commonly use “benchmark terms”, which include annual sales terms, and can be annually negotiated. In contrast, spot contracts use spot terms, and are negotiated on a contract-by-contract basis. Likely contracts other than concentrate sales may include bulk shipping, ship-loading services, load/port agency, and data management/invoicing contracts.

Other major contracts that may be entered into could cover items such as electricity supply, bulk commodities, operational and technical services, mining and process equipment, earthworks projects, security, transportation and logistics, and administrative support services. Such contracts would typically be reviewed and negotiated on a frequent basis and the terms would be typical of similar contracts both regionally and nationally.

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Capital and Operating Costs

Capital Costs

The capital cost estimate was prepared as an Association of the Advancement of Cost Engineering International (“AACE International”) Class 3 estimate with an accuracy of ±15%, and is reported using Q3 2023 Canadian dollars.

The capital cost estimate includes:

The capital cost estimate is summarized in Table 1-5. Total capital costs over the LOM are estimated at:

Table 1-5 – Capital Cost Estimate

Operating Costs

Operating costs are reported using Q3 2023 Canadian dollars and are in line with an AACE International Class 3 estimate with an accuracy range of ±15%

The operating cost estimate includes:

The operating cost estimate is summarized in Table 1-6. Total operating costs over the LOM are estimated at:

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