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United States
Castle Mountain is a heap leach gold project located in California, USA, north of Equinox’s Mesquite mine. Castle Mountain is being developed by Equinox in two stages, Phase 1 and Phase 2. Equinox has indicated that Phase 2, which is expected to begin in the latter half of the decade and includes the South Domes region, is projected to expand production to more than 200 koz of gold annually. Front end engineering and permitting is underway for the Phase 2 expansion, with the federal Record of Decision now expected in December 2026 and a sanction decision targeted in 2027. Phase 1 mining was suspended in August 2024 for the duration of the Phase 2 permitting process.
Castle Mountain is poised to become one of the USA’s largest gold mines with expected annual output of 218 koz and total all-in sustaining costs of $858/oz over the 14 year Phase 2 mine plan. Castle Mountain currently boasts 4.1 Moz of gold Mineral Reserves, of which South Domes covers approximately 1.1 Moz of gold Mineral Reserves. Equinox has outlined the potential to expand the 2021 feasibility study Mineral Reserve pits to ultimately connect the JSLA and South Domes pits.
Equinox has focused recent exploration activities in the area between South Domes and JSLA, with infill drilling completed on the South Overburden and JSLA dumps. Activities are ongoing to amend the current mining permits for the Phase 2 expansion.
Metalla's 5% NSR royalty covers the South Domes region, including the overlying South Overburden.
Metalla GEOs reflect the attributable gold-equivalent ounces under the 5.00% NSR Royalty. Resources shown exclusive of reserves. See Asset Handbook for full notes.
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