New Au-Cu Porphyry Targets At The Whistler Gold-Copper Project

ANCHORAGE, AK – U.S. GoldMining Inc. reported on the 2025 exploration program at its Whistler Gold-Copper Project. The 2025 exploration program focused on targeting potential resource growth through developing new drill targets at the Whistler Orbit and Muddy Creek prospect areas from the scout drilling program completed over the Whistler Orbit.
Four new high priority target areas identified from basal till and/or top of bedrock gold-copper geochemistry, combined with geological mapping of porphyry distribution and geophysical surveys (magnetics ± IP chargeability), suggestive of potential for the future discovery of new bedrock porphyry gold-copper mineralization. Whistler extensions – new zones of copper anomalism in both basal till and top of bedrock sampling located immediately east of the currently delineated Whistler deposit. Mammoth & Snow Ridge – two new large gold ± copper anomalies located 2-3 kilometers north of the Whistler deposit comprised of broad intense gold anomalies in tills and bedrock. Raintree area – widespread gold ± copper anomalism indicative of wingspan extensions immediately adjacent to the existing Raintree deposit and throughout the broader target area. Hotfoot – emerging new target defined by an intense bedrock gold anomaly associated with a large ‘Whistler look-alike’ magnetic anomaly 1 kilometer south of Raintree deposit.  
The highest priority targets are now being prepared for follow-up infill and expansion scout drilling, followed by deeper diamond core drilling, projected to commence in summer 2026. The Company continues to advance its previously announced initial assessment study (PEA) for the Project (see news release dated June 9, 2025).
Tim Smith, Chief Executive Officer, said, “We are pleased with the outcome of the scout drilling program completed over the Whistler Orbit area in 2025, which provided further indication of the potential for discovery of new Au-Cu porphyry deposits. The objective of the 2025 summer program was to follow up on the over 25 individual geophysical intrusive targets previously identified from magnetic inversion modelling, by systematically collecting geochemical data across the Whistler-Raintree porphyry cluster to provide an additional vector to defining high priority drill targets. Several zones of strongly anomalous Au & Cu in basal till and top of bedrock samples, in conjunction with lithologic mapping and the existing geophysical data, provide compelling evidence in support of conducting deeper systematic core drilling to test for new discoveries of bedrock hosted economic Au-Cu mineralization, which is currently being planned for the upcoming 2026 field season.
Additional pending exploration results for the Muddy Creek program, also completed during the 2025 field season, will be provided in due course as analysis and interpretation is completed. The Whistler PEA is progressing, and the Company is currently aiming to release results before the end of Q1 2026. We believe that the combination of gold, copper and silver hitting all-time high commodity prices over recent months, the existing large gold-copper-silver mineral resource and district-scale exploration potential and the project’s location in one of America’s most prospective and mining-friendly jurisdictions, Alaska, marks a potential inflection point for the Company over the coming year. We look forward to providing further updates on the Whistler Project, including our plans for ongoing exploration and further mine scoping studies throughout the year ahead.”