Mr. Ian Klassen reports

GRANDE PORTAGE PROVIDES UPDATE REGARDING TECHNICAL & PERMITTING ADVANCES FOR THE NEW AMALGA GOLD PROJECT

Grande Portage Resources Ltd. has provided an update regarding the advancement of a number of technical and permitting initiatives related to its New Amalga gold project in Southeast Alaska.

• Grande Portage has received a five-year fish habitat permit from the Alaska Department of Fish & Game relating to the proposed installation of a stream level monitoring system for the Herbert River within the project area. This will provide critical baseline data necessary for engineering design and future environmental review. Installation of this instrumentation will proceed after receipt of the special use permit which has been applied for with the United States Forest Service.
• In line with the company's plans to advance toward a preliminary economic assessment (PEA) for the project, an initial geotechnical and hydrogeological review has been completed by SRK Consulting to inform the PEA as well as guide future stages of fieldwork to further define the expected groundwater conditions and rock behaviour in the deposit area.
• An aerial lidar scan has been completed for the project's potential infrastructure areas and access road corridor. The data from this scan, in combination with the company's existing lidar data for the terrain above the mineral resource area, will be instrumental toward the planning and engineering design of surface infrastructure, buildings and roadways.
• The company has contracted two independent ore offtake studies to identify the most optimal destination for sorted ore from New Amalga under a direct-to-smelter scenario, along with expected gold payabilities and transportation costs. This will provide key inputs for developing a preliminary economic assessment for the project.
• The company has retained Ensight LLC as its NEPA consultant to prepare the project for the environmental review process. Charles Johnson, principal of Ensight LLC, has over 30 years of NEPA experience and guided the nearby Greens Creek mine through the pre-NEPA activities and NEPA process resulting in a successful EIS in 2024. This EIS enabled a major expansion of the mine's tailings facility for up to 17 additional years. Mr. Johnson also collaborated with the USFS to develop and finalize their record of decision document for that project.
• On Aug. 27, a memorandum of understanding was signed between the State of Alaska and the Federal Permitting Improvement Steering Council which enables the Alaska Department of Natural Resources to co-ordinate directly with the permitting council and nominate projects for streamlined and transparent permitting under the federal FAST-41 program. Grande Portage applauds this milestone and sees this as one of multiple potential pathways for enabling the project's expeditious advancement through the environmental review and permitting process.

The future facilities at the project site are envisioned to include a small-footprint underground mining operation without an ore processing plant or tailings disposal landfill. 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.

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.

We seek Safe Harbor.