U.S. GoldMining Inc. Selects Ausenco to Deliver Initial Economic Assessment At Whistler Gold-Copper Project, Alaska

PEA to incorporate updated 2024 drilling and evaluate standalone open-pit operation

ANCHORAGE, Alaska, June 9, 2025 /PRNewswire/ - U.S. GoldMining Inc. (NASDAQ: USGO) ("U.S. GoldMining" or the "Company") is pleased to announce it has selected Ausenco Engineering Canada ULC ("Ausenco") as the principal consulting firm to lead its proposed initial assessment study ("PEA")  for the Whistler Gold-Copper Project ("Whistler" or the "Project"), located 105 miles northwest of Anchorage, Alaska. The study, as previously announced April 15, 2025, is intended to constitute an initial assessment under U.S. Regulation S-K 1300 ("S-K 1300") and a preliminary economic assessment under Canadian National Instrument 43-101 ("NI 43-101").

Highlights:

• The PEA is intended to explore and outline a development opportunity at the Whistler Project for a stand-alone open pit mine and concentrator facility located approximately 100 miles northwest of Anchorage in south-central Alaska, a region which has significant existing and ongoing infrastructure development.
  
  
• The PEA will consider the Whistler mineral resource estimate which currently stands at 6.48 million ounces (Moz) gold equivalent (AuEq) compiled from the indicated resource category and 4.16 Moz AuEq in the inferred resource category (see Table 1 for details). The Project is anticipated to benefit from the deposit's near-surface, higher-grade core material in the early years of production.
  
  
• The PEA will utilize an updated mineral resource estimate to be completed by Moose Mountain Technical Services, which will include 2024 drilling that was not available for the previous mineral resource estimate. In addition, metallurgical test work is currently being conducted by Base Metallurgical Laboratories Ltd., as previously announced on April 24, 2025.
  
  
• The Company completed a comprehensive bidding process, receiving initial expressions of interest from 13 consulting firms, followed by a rigorous Request for Proposal ("RFP") review of six shortlisted candidate firms. Ausenco was selected from this process on the strength of its experience across all disciplines and its track record in recent delivery of comparable studies.

Tim Smith, Chief Executive Officer of U.S. GoldMining, commented: "We're delighted to be able to announce that we have partnered with Ausenco on this important work program. We're excited to  begin working towards delivering the first PEA on Whistler, which we believe could present a robust future mining opportunity and has the potential to unlock significant value for shareholders. We look forward to providing periodic updates as the study progresses, for which we are currently targeting completion before year-end."

David Thomas, Vice President, Minerals & Metals, Southwest USA of Ausenco, commented: "Ausenco is pleased to partner with U.S. GoldMining on the Whistler Gold-Copper Project PEA. We've successfully completed studies for clients around the world, including initial concept studies, pre-feasibility studies and definitive studies. As a lifelong Alaskan who lived many years in the Matanuska-Susitna (Mat-Su) Borough – where the Whistler Project is located - I'm delighted to add to the direct Alaskan experience of the team and help deliver U.S. GoldMining a robust, sustainable mining study."

About U.S. GoldMining Inc.
U.S. GoldMining Inc. is an exploration and development company focused on advancing the 100% owned Whistler Gold-Copper Project, located 105 miles (170 kilometers) northwest of Anchorage, Alaska, U.S.A. The Whistler Project consists of several gold-copper porphyry deposits and exploration targets within a large regional land package entirely on State of Alaska Mining claims totaling approximately 53,700 acres (217.5 square kilometers). Visit www.usgoldmining.us for more information.

About Ausenco
Ausenco is a global company redefining what's possible. The team is based out of 21 offices working across five continents to deliver services worldwide. Combining deep technical expertise with a 30-year track record, Ausenco delivers innovative, value-add consulting, studies, project delivery, asset operations and maintenance solutions to the minerals and metals and industrial sectors (www.ausenco.com).

Table 1 Mineral Resource Estimate for the Total Project (Effective date: September 12, 2024)

For further information regarding the Project and the mineral resource estimates referenced herein, refer to the technical report summary titled "S-K 1300 Technical Report Summary Initial Assessment for the Whistler Project, South Central Alaska" with an effective date of September 12, 2024, and the technical report titled "NI 43-101 2024 Updated Mineral Resource Estimate for the Whistler Project, South Central Alaska" with an effective date of September 12, 2024, available under the Company's respective profiles at www.sec.gov and www.sedarplus.ca.

Tim Smith, P.Geo., Chief Executive Officer of the Company, has supervised the preparation of this news release and has reviewed and approved the scientific and technical information contained herein. Mr. Smith is a "qualified person" as defined under NI 43-101.

Forward-Looking Statements

Except for the statements of historical fact contained herein, the information presented in this news release constitutes "forward-looking statements" within the meaning of the United States federal securities laws and "forward-looking information" within the meaning of applicable Canadian securities laws (collectively, "forward-looking statements"). Such statements include statements with regard to the Company's expectations regarding the Project and the proposed PEA. Words such as "expects", "anticipates", "plans", estimates" and "intends" or similar expressions are intended to identify forward-looking statements. Forward-looking statements are based on U.S. GoldMining's current expectations and are subject to inherent uncertainties, risks and assumptions that are difficult to predict and involve known and unknown risks, uncertainties and other factors, which may cause the actual results, performance or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Such risks and other factors include, among others, the actual results of future exploration may not confirm expectations, variations in the underlying assumptions associated with the estimation or realization of mineral resources, the availability of capital to fund programs, accidents, labor disputes and other risks of the mining industry including, without limitation, those associated with the environment, delays in obtaining governmental approvals or permits, title disputes other risks inherent in the exploration and development of mineral properties and the other risk factors set forth in the Company's filings with the U.S. Securities and Exchange Commission at.www.sec.gov and Canadian Securities Administrators at www.sedarplus.ca. Although the Company has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. Accordingly, readers should not place undue reliance on forward-looking statements contained in this news release. Forward-looking statements contained in this news release are made as of this date, and U.S. GoldMining does not undertake any duty to update such information except as required under applicable law.

SOURCE U.S. GoldMining Inc.