American Rare Earths launches feasibility drilling at Cowboy State Mine on Halleck Creek project

American Rare Earths CEO Mark Wall joined Steve Darling from Proactive to announce the start of the company’s 2026 exploration drilling program at the Cowboy State Mine within the Halleck Creek Rare Earths Project in Wyoming. The new campaign represents the beginning of feasibility-level drilling designed to support advancement toward a Definitive Feasibility Study (DFS) at what is believed to be the largest known rare earth deposit in the United States based on total rare earth oxide content. Wall explained that the program is intended to establish the geological, geotechnical, and engineering foundation necessary for future mine planning and reserve development. The company plans to complete approximately 3,050 metres of HQ core drilling across 19 drill holes focused on the Red Mountain area of the project. Drilling officially commenced on May 13, 2026, and is expected to continue through mid-July. According to the company, the program is anticipated to generate approximately 1...