Silver Bow Mining aims to develop critical and precious metals resources through underground mining operations in Butte, Montana. We value transparency, sustainability and meaningful community impact throughout all aspects of our work.
Our plan for underground mine operations builds on Butte’s historic mining infrastructure with modern safety protocols and technologies. We aim to add the next chapter to Butte’s 150 years of mining history and create lasting economic value through responsible resource development.
For us, that chapter only counts if it benefits the community where we live and work: environmental protection and economic opportunity together, with modern methods that make the work safer and cleaner.
The Rainbow Block is approximately 878 acres of mineral rights located in historic North Butte and Walkerville, Montana. First given its moniker by early miners due to the great “Silver Bow” of veins visible on the surface that extend to depth.
The Butte mining district holds over 10,000 miles of tunnels. Our team has georeferenced and modeled the underground workings within the Rainbow Block.
27 August 2026Follow along as we make progress exploring the Rainbow Block. We add new photographs as the work continues — check back for the latest.
Emily Vein mineralization intersected in two drill holes; SBM26-05 also returns 680.8 g/t AgEq over 1.3 m from the Rainbow Vein
Read release →Bond guarantees expected to release approximately US$42 million of cash reclamation bond collateral to Silver Bow Mining; US$5 million pre-bridge financing to be funded within five business days
Read release →SBM26-09 Intersected the Black Rock Copper Vein, Approximately 30 Meters Below an Unmined Copper-Silver Block Shown in Historical Anaconda Records
Read release →
From the beginning of its history, the Butte Mining District produced over 10.8 Mt copper, 715 Moz silver, 2.5 Mt zinc and 2.9 Moz gold.
Get press releases and drill results as they’re published.
