Mr. Ian Klassen reports

GRANDE PORTAGE RESOURCES ANNOUNCES INTERIM DRILLING PROGRAM UPDATE AND DRILLS 17.4 GPT GOLD OVER 2.95 METERS ON GOAT VEIN AT THE HERBERT GOLD PROPERTY IN S.E ALASKA

Grande Portage Resources Ltd. has provided the following interim update to its summer drill program at the Herbert gold project located in southeastern Alaska.

To date, the company has drilled approximately 10,000 feet in eight holes from three platforms. Drilling is well into hole nine now and the balance of the program will continue until November. The company has only received results on a small percentage of its sample submissions to date while the balance is still at the lab.

The first hole was a continuation from 2022 whereby the company re-entered diamond drill hole (DDH) 22AB-5 drilling to the south and intersected a four-metre hydrothermally altered structure 150 metres beyond the Goat vein which project geologists interpret to be the Sleeping Giant vein and which contained a 1.2-metre intercept (3.93 feet) of 7.83 grams per tonne Au. This intercept is anticipated to extend the established resource by extending that zone to depth by approximately 60 metres. DDH 23AB-5 also intersected a footwall vein of the Main vein showing 0.52 metre (1.8 ft) of 19.7 g/t Au.

After completing drilling activity on pad AB, the company moved the rig to pad M where it drilled four holes to test the western Goat vein and the Goat hangingwall targets. All drill holes intersected mineralization in the targeted Goat vein. Drill hole 23M-1 returned 2.95 metres (9.7 ft) of 17.4 g/t Au which includes 0.92 metre (3.01 ft) of 55.7 g/t Au.

This hole was located 45 metres west of the company's historical DDH 18M-6 (61.83 g/t Au/1.2 metres), 80 metres above DDH 18M-7 (3.25 g/t Au/two metres), 40 metres below DDH 17L-2 (NSV) and 50 metres east of DDH 17L-4 (5.90 g/t Au/6.3 metres). Assays are currently pending on the other holes. Drill hole 23M-1 was designed to fill in a gap in the Goat vein mineral resource and should assist in upgrading the confidence in the mineral resource in this area.

The company then moved the drill rig to pad P where four holes total will be drilled. DDH 23P-3 extended southward past the Goat vein and intersected the Sleeping Giant vein. The company has completed three holes from this pad and is pleased to confirm quartz mineralization has been encountered in the holes. Intercept sample analyses from these holes are also pending.

Once the company completes drilling at pad P, the drill rig will be moved to pad BB which is the easternmost drill pad on the property where it will drill at least four holes testing the eastern portions of the Goat vein and the Sleeping Giant vein. These holes will test the eastward projection of a higher-grade section of the Goat vein into open territory.

Ian Klassen, president and chief executive officer, reports, "Our plan in 2023 was to fill in gaps in the established resource to allow for a higher level of confidence in any new resource estimate and to have valuable incremental stepouts in areas that had demonstrated mineralization in the past that might be open for expansion."

This news release has been prepared and approved by Carl Hale, CPG, a geologist with more than 40 years of experience and a qualified person as defined under National Instrument 43-101.

About Grande Portage Resources Ltd.

Grande Portage Resources is a publicly traded mineral exploration company focused on the Herbert gold discovery situated approximately 25 kilometres north of Juneau, Alaska. The company holds a 100-per-cent interest in the Herbert property. The Herbert gold property 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 km long Juneau gold belt, which has produced over seven 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 three grams per tonne gold (g/t Au) and consists of: an indicated resource of 1,196,800 ounces of gold at an average grade of 10.23 g/t Au (3,637,000 tonnes) and an inferred resource of 325,900 ounces of gold at an average grade of 8.91 g/t Au (1,138,000 tonnes), as well as an indicated resource of 686,700 ounces of silver at an average grade of 5.87 g/t Ag (3,637,000 tonnes) and an inferred resource of 169,300 ounces of silver at an average grade of 4.63 g/t silver (1,138,000 tonnes).