Thunder Mountain Gold, Inc. reported an updated Mineral Resource Estimate incorporating results from BeMetals Corp. Phase 1 and 2 underground diamond drilling programs at the South Mountain Project in southwestern Idaho, U.S.A. The updated MRE includes a substantially increased resource for the Project while maintaining the high-grade nature of the mineralization. The updated Independent MRE, which has an effective date of April 20, 2021, was prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects by Hard Rock Consulting, LLC, based in the U.S.A. In two phases of drilling completed during 2019 and 2020 a combined total of approximately 16,000 feet of underground core drilling was completed at South Mountain. During these drilling campaigns, company site team also widened and advanced the existing Sonneman level eastwards by 170 feet to establish a new drill station closer to the Texas Zone. All the results of this drilling have now been in incorporated into the updated MRE for the South Mountain deposit. The historical Technical Report for the Mineral Resource Estimate for the South Mountain Project Owyhee County, Idaho USA Report Date: Dated: April 1, 2019 is filed on SEDAR. The Company also reports further BMET drilling results from both the Texas East and Texas West Zones. This new data supports previously reported results, illustrating the high-grade zinc-silver-gold nature of the Texas East mineralization, and generally copper-silver dominant Texas West Zone. The South Mountain Mine is a polymetallic development project focused on high-grade zinc and silver along with associated copper, gold and lead., and is located approximately 70 miles southwest of Boise, Idaho. The Project was intermittently mined from the late 1800s to the late 1960s and its existing underground workings remain intact and well maintained. Historic production at the Project has largely come from high-grade massive sulfide bodies that remain open at depth and along strike. According to historical smelter records, approximately 53,642 tons of mineralized material has been mined to date. These records also indicate average grades; 14.5% Zn, 363.42 g/t Ag, 1.98 g/t Au, 2.4% Pb, and 1.4% Cu were realised. Thunder Mountain Gold Inc. purchased and advanced the project from 2007 through 2019, with expenditures into the project of approximately US$12million. In 2019, BeMetals Corp. purchased an option on the Project, and has formed a Boise, Idaho-based project team that is focused on advancing South Mountain. This team includes key management of Thunder Mountain Gold Inc., Optionee of the Property. The project team has completed re-establishment of the Project site and have conducted two phases of drilling. The team continues to build and maintain strong relations with local communities relevant to the South Mountain Project. The Project is largely on and surrounded by private surface land, and as such, the permitting and environmental aspects of the Project are expected to be straightforward. Permits are in place for underground exploration activities and BeMetals does not anticipate significant barriers to any future development at the Project.