Progress From The Richmond Hill Drill Campaign & Metallurgical Test Program

LEAD, SD – Dakota Gold Corp. reported on 16 metallurgical drill holes included in its 2025 drill campaign for the Richmond Hill Oxide Heap Leach Gold Project. Dakota Gold currently has three drills operating at Richmond Hill and the Company expects to drill 27,500 meters (~90,000 feet) for the 2025 campaign using a combination of reverse circulation and core drilling.

Metallurgical drill holes continue to intercept higher gold grade than the average resource grade including drill hole RH25C-200 with 2.25 grams per tonne gold (g/t Au) over 33.4 meters (75 gram meters) and RH25C-212 with 1.44 g/t Au over 20.6 meters (30 gram meters). These holes are two of many metallurgical drill holes reported from the north central Project area that intercepted significantly higher-grade than the average measured and indicated resource grade of 0.463 g/t Au (0.0135 ounces per ton Au).

The Company’s core drilling is currently active in the northeast Project area where we expect assay results from expansion and infill of the higher-grade zones before the end of the year. The proposed infill and expansion drilling surrounding the intercept has the potential to add to the Measured, Indicated and Inferred resources based on prior drilling and current resources in the area. The mineralization in the northeast is only limited by drilling and remains open. The area is expected to be mined at the beginning of the mine plan.

Jack Henris, President and COO, said, “As the metallurgical drilling for the 2025 campaign is now complete, we are pleased to have formally engaged Forte Dynamics for the test work program. This program represents a critical step in advancing Richmond Hill toward feasibility and future development. It will provide the technical basis for process design, cost modeling, and permitting, thereby de-risking the Project and supporting informed decision-making by Dakota Gold’s management and Board of Directors.”

Dakota Gold is conducting core drilling at the northern portion of the Project area for the purposes of completing a Feasibility Study. The core drilling is designed to collect metallurgical samples for column testing, condemnation drilling beneath proposed site infrastructure for mine planning, infill drilling to upgrade the existing resource, and expansion drilling where the resource remains open. The drill core from all holes is systematically assayed for gold due to the significant halo of low-grade gold mineralization underlying much of the Project area. The drill results will inform both the oxide and sulfide resource updates for the Feasibility Study. In addition, the Company is also active with a reverse circulation drill to install monitor wells in support of environmental baseline data collection for permitting.