Grande Portage Resources Launches Busy Summer Season with 2026 Drill Program at the New Amalga Gold Project

About this update from Grande Portage Resources Ltd.

VANCOUVER, BC / ACCESS Newswire / June 17, 2026 / Grande Portage Resources Ltd. (TSXV:GPG) (OTCQX:GPTRF) (FSE:GPB) ("Grande Portage" or the "Company") is pleased to announce the commencement of the Company's 2026 drilling program at the New Amalga Gold property near Juneau, Alaska. The program planned for 2026 includes up to 4,300 meters of diamond drilling from up to 14 drillholes as well as installation of downhole instrumentation. The drillholes will provide additional definition to upgrade resource classification in key areas of the deposit and will characterize the geotechnical and hydrogeological aspects of the rock mass to gather data necessary for the environmental review and permitting process as well as to inform mine development plans. The geotechnical and hydrogeological characterization work will include: Detailed geotechnical logging to define the rock conditions in areas of key underground infrastructure Installation of piezometers in select drillholes to measure groundwater levels and pressures Packer testing, which involves pumping pressurized water into a drillhole to determine the hydraulic conductivity or permeability of the rock structures intersected by the hole Groundwater sampling and chemical analysis to assess baseline groundwater quality The 2026 program is being conducted under a Plan of Operations approved by the US Forest Service on January 16, 2026 and utilizes several industry-leading contractors including: SRK Consulting Inc, overseeing the hydrogeological testwork and geotechnical assessments, plus subsequent development of a hydrogeological model to determine the expected level of groundwater inflows into the mine workings. Timberline Drilling Inc, providing core drilling services with extensive experience in Southeast Alaska including at other Juneau-area mining operations. Piton Exploration LLC, based in Palmer, Alaska, providing exploration support services including drill pad construction and core logging. Coastal Helicopters Inc, based in Juneau, Alaska, providing helicopter transportation and logistics services. Ian Klassen, President and CEO comments: "We are pleased to announce the mobilization of a premier team of contracting partners the 2026 drilling campaign, including prominent Alaska-based firms. The launch of this year's program marks a key milestone for the New Amalga project, signaling the drilling progr...

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