Mr. Ian Klassen reports

GRANDE PORTAGE STAKES ADDED CLAIMS TO ACCOMMODATE POTENTIAL SURFACE FACILITIES AT THE NEW AMALGA GOLD PROJECT

Grande Portage Resources Ltd. has staked 64 new federal claims adjacent to its existing exploration claims at the New Amalga gold project in southeastern Alaska.

The added claims are intended to accommodate future surface facilities in support of a potential underground mine at the site. Such facilities could include buildings and infrastructure for:

• Electrical utilities;
• Equipment maintenance;
• Ore sorting;
• Backfill preparation;
• Supplies warehousing;
• Water treatment;
• Office and administration.

Environmental studies and fieldwork are continuing to determine the ideal layout of the potential surface facilities to ensure protection of fish habitat, maintain integrity of wetlands and minimize overall ecological footprint.

The potential surface facilities are not planned to include an ore processing plant. Due to the resource location near tidewater and fewer than four miles (6.5 kilometres) from existing paved highway, the company considers off-site processing by a third party to be the most favourable configuration for the project. This set-up provides several potential benefits:

• Eliminates the need to build a concentrator, greatly reducing project construction capital expenditures;
• Results in no tailings generated at the site, removing the need to develop a tailings disposal facility near the mine;
• Avoids the need for permanent waste rock storage facilities; all waste rock generated from mine access development would be returned to the underground workings for stope backfill;
• No use of chemical reagents for gold processing at the site;
• Dramatically reduces land usage and overall environmental footprint;
• Greatly facilitates postmining closure and reclamation;
• Simplifies the environmental review and permitting process.

Ian Klassen, president and chief executive officer, commented: "We are extremely pleased to have secured these additional claims for the future mine surface facilities -- a key milestone in our work towards preparing for the environmental review and permitting process. As always, our commitment is to exceed all regulatory requirements and environmental expectations while contributing to the local economy and creating long-term job opportunities for the community of Juneau."

The company is also pleased to confirm that it has received all necessary regulatory approvals for its coming 2025 field program at its New Amalga gold project (formerly the Herbert gold project).

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 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 km 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 NI 43-101 mineral resource estimate reported at a base-case mineral resources cut-off grade of 2.5 grams per tonne gold and consists of: an indicated resource of 1,438,500 ounces of gold at an average grade of 9.47 grams per tonne gold (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.

We seek Safe Harbor.