Grande Portage Resources Advances Ongoing Project Studies and Fieldwork to Support New Amalga Gold Project Development

About this update from Grande Portage Resources Ltd.

Preparing for the Federal Environmental Review (EIS) and Permitting Process VANCOUVER, BC / ACCESS Newswire / June 1, 2026 / Grande Portage Resources Ltd. (TSXV:GPG)(OTCQX:GPTRF)(FSE:GPB) ("Grande Portage" or the "Company") is pleased to provide a project update for the New Amalga Gold property near Juneau, Alaska. In addition to the 2026 drill program, numerous engineering studies and environmental fieldwork programs are in-progress utilizing several industry-leading consulting firms, most of which are based in Alaska. These activities provide key inputs for the environmental review and permitting process which the Company will initiate with the State and federal regulatory agencies to enable development of the mining operation. Current and planned activities for the 2026 field season include: Access Road Design - RESPEC (Anchorage, AK / Juneau, AK) Engineering design and geotechnical surveys for the access road for which the company is currently applying for an easement from the State of Alaska. This initial road segment is located on State land and construction can be initiated without Federal permitting, with a near-term benefit of establishing a drilling materials staging area and helicopter landing pad much closer to the project site compared to current facilities in Juneau. Aquatic Studies - Alaska Dept of Fish & Game (Juneau, AK) Continuation of field surveys and sampling to document aquatic biological conditions in the project area are necessary to inform future ADF&G Fish Habitat Permits and other state and federal permits, as well as to support mine design protective of fish habitat and fish passage. This work will be conducted by the Alaska Dept of Fish & Game under contract with Grande Portage. Climate Assessment - Stantec Consulting Services (Various Locations) Evaluation of current and potential future climate conditions in the project area which will define engineering and environmental criteria for snowfall, precipitation events, and other factors. This will influence the design of the facilities and associated environmental controls as well as inform the federal NEPA environmental review process. Archeological & Cultural Resource Surveys - Stephen R. Braund & Associates (Anchorage, AK) Extensive field surveys to identify any historical or archeological & cultural sites in proximity to the proje...

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