Mr. Ian Klassen reports

GRANDE PORTAGE RESOURCES FILES 2026 PLAN OF OPERATIONS / DRILL PERMIT WITH THE U.S. FOREST SERVICE

Grande Portage Resources Ltd. has filed its 2026 plan of operations (drill permit) with the United States Forest Service for upcoming drilling and fieldwork at the New Amalga gold property in southeast Alaska.

Subject to regulatory approval, the proposed program for 2026 includes up to 4,300 metres of diamond drilling from up to 14 drill holes, as well as installation of instrumentation, surface mapping, and trench sampling. The drill holes 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 in order 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 drill holes to measure groundwater levels and pressures;
• Packer testing, which involves pumping pressurized water into a drill hole to determine the hydraulic conductivity or permeability of the rock structures intersected by the hole.

Ian Klassen, president and chief executive officer, comments: "The filing of the 2026 plan of operations marks an important milestone for the New Amalga project as it advances to a mix of exploration and development. For the first time, drilling will be gathering the critical geotechnical and hydrogeological data necessary to inform engineering and environmental studies. This is a key step to enable the project to advance through the regulatory process and towards mine development."

Mr. Klassen continued: "We would like to thank our local regulatory officials at the U.S. Forest Service, several of whom were brought back from furlough during the recent U.S. federal government shutdown in order to continue advancing the permits for New Amalga and other mining projects in the region. This is a strong and welcome signal that the U.S. federal government and the U.S. Forest Service consider permitting efforts for New Amalga to be a top priority due to the economic benefits the project will bring to the region."

The New Amalga gold project remains open to expansion in multiple directions and hosts an indicated resource of 1,438,500 ounces of gold at an average grade of 9.47 grams per tonne Au (4,726,000 tonnes) and an inferred resource of 515,700 ounces of gold at an average grade of 8.85 g/t Au (1,813,000 tonnes). The current development concept envisions a small-footprint underground mining operation with third party offsite processing, eliminating the need for an on-site mill or tailings storage facility.

Kyle Mehalek, PE, is the qualified person within the meaning of National Instrument 43-101 and has reviewed and approved the technical disclosure in this release. Mr. Mehalek is independent of Grande Portage within the meaning of NI 43-101.

About Grande Portage Resources Ltd.

Grande Portage Resources is a publicly traded mineral exploration company focused on advancing the New Amalga mine project, the outgrowth of the Herbert gold discovery situated approximately 25 kilometres north of Juneau, Alaska. The company holds a 100-per-cent interest in the New Amalga property. The New Amalga gold system is open to length and depth, and is host to at least six main composite vein-fault structures that contain ribbon structure quartz-sulphide veins. The project lies prominently within the 160-kilometre-long Juneau gold belt, which has produced over eight million ounces of gold.

The company's updated National Instrument 43-101 mineral resource estimate (MRE) reported at a base case mineral resources cut-off grade of 2.5 grams per tonne gold (g/t Au) and consists of: an indicated resource of 1,438,500 ounces of gold at an average grade of 9.47 g/t Au (4,726,000 tonnes); and an inferred resource of 515,700 ounces of gold at an average grade of 8.85 g/t Au (1,813,000 tonnes), as well as an indicated resource of 891,600 ounces of silver at an average grade of 5.86 g/t Ag (4,726,000 tonnes); and an inferred resource of 390,600 ounces of silver at an average grade of 7.33 g/t silver (1,813,000 tonnes). The MRE was prepared by Dr. David R. Webb, PhD, PGeol, PEng (DRW Geological Consultants Ltd.), with an effective date of July 17, 2024.

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