Mr. Ian Klassen reports

GRANDE PORTAGE SUBMITS SPECIAL USE PERMIT APPLICATION FOR ENVIRONMENTAL INFRASTRUCTURE AT THE NEW AMALGA GOLD PROJECT

Grande Portage Resources Ltd. has applied to the U.S. Forest Service (USFS) for a special use permit related to its New Amalga gold project in southeastern Alaska.

The application covers the installation of infrastructure and equipment related to environmental studies and monitoring, including:

• An environmental data collection station at the potential location of the mine's surface facilities to collect key meteorological data and inform project development decisions as well as future application for an Alaska Department of Conservation air quality control permit and Alaska pollutant discharge elimination system (APDES) permit;
• Additional meteorological monitoring equipment above the potential future location of underground workings;
• Stream gauging sensors to understand seasonal fluctuations in river levels and support design of a mine water treatment and handling system that is protective of fish habitat;
• Satellite uplink communications and power infrastructure necessary for system operation.

This infrastructure is intended to be utilized not only for preliminary environmental studies but also for continuing monitoring during construction, operations and closure of the potential mine facility.

Ian Klassen, president and chief executive officer, commented: "The submission of the special-use permit application is a key step towards gathering all the data necessary to design and permit a low-footprint mining operation which is protective of the surrounding environment. Installation of this equipment is also a milestone as the first instance of developing long-term infrastructure at the project site that could be utilized throughout construction, operation and closure of a future mine."

The company has also conducted contracted fieldwork over the preceding two months, which includes identification of fish-habitat streams and mapping of aquatic resources in the project vicinity as well as delineation of wetlands around the potential areas of mine surface infrastructure development. These new data are now being incorporated into the design and layout of the mine facilities to ensure protection of fish habitat, maintain integrity of wetlands and minimize overall ecological footprint, which will help facilitate the future environmental review and permitting process for the project.

The facilities at the project site are not planned to include an ore processing plant. Due to the resource location near tidewater and less 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, minimizing mine footprint, power requirements and reducing project construction capex (capital expenditures);
• Eliminates the need to develop a tailings disposal facility at the site as no tailings would be generated;
• No permanent waste rock storage facilities; waste rock generated from mine development would be returned to the underground workings for permanent disposal as 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.

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 NI 43-101 mineral resource estimate (MRE) 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 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.

We seek Safe Harbor.