Mr. Brian Penny reports

SUNDAY LAKE GOLD CORP. APPOINTS NEW DIRECTOR

Sunday Lake Gold Corp. has appointed Michael Westendorf to Sunday Lake Gold's board of directors, effective immediately. Mr. Westendorf was nominated by Waratah Capital Advisors Ltd. to serve as its representative on the board pursuant to the investor rights agreement between the company and Waratah, as announced on May 20, 2026. Mr. Westendorf will also serve as a member of the board of directors' technical and health, safety and environment (HSE) committee.

Mr. Westendorf is a professional engineer with over 20 years of experience in mining operations, metallurgy, process engineering, capital projects and corporate development. His career spans the full mining life cycle, from feasibility studies and project development through construction, commissioning, operations and expansion.

Mr. Westendorf currently serves as chief operating officer of Lithium Ionic Corp., where he has played a key role in advancing the company's Bandeira lithium project in Minas Gerais, Brazil. He also serves as metallurgical adviser to Kodiak Copper Corp.

Previously, Mr. Westendorf held several senior technical and operational positions at Copper Mountain Mining Corp., including director of operational excellence, director of metallurgy and mill manager. During his tenure, he oversaw a 40,000-tonne-per-day copper processing operation, supported mine expansions and operational improvements, and led development activities at the Eva copper project in Queensland, Australia.

Mr. Westendorf holds a bachelor of applied science in metals and materials engineering from the University of British Columbia and is a registered professional engineer.

Janet Wilkinson, chairperson of Sunday Lake Gold, commented: "Michael brings extensive technical expertise and a proven track record in mine development, operations and project execution. His experience across all stages of the mining life cycle, from engineering and feasibility studies through construction and production, will be particularly valuable as we advance the Fenelon gold project toward the completion of a prefeasibility study. We look forward to benefiting from his insights and strategic guidance as we continue to unlock the value of our gold assets and build long-term value for our stakeholders."

About Sunday Lake Gold Corp.

Sunday Lake Gold is focused on creating value through the exploration and sustainable development of gold projects in Quebec's Abitibi region while respecting the environment and communities where it operates. The company holds a contiguous mineral property position totalling 598 square kilometres that extends approximately 82 kilometres along the Detour-Fenelon gold trend. The property is host to the company's flagship preliminary-economic-assessment-stage Fenelon gold project and its earlier-exploration-stage Martiniere gold project as well as numerous greenfield gold projects.

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