Blackrock Silver Drills 5.03 Metres of 750 g/t AgEq (Including 1.83 Metres of 1,661 g/t AgEq) and Reports Multiple Thick Mineralized Zones in First Assays from Eastern Expansion Drill Program at Tonopah West

On October 27, 2025, Blackrock Silver announced initial assay results from its Eastern Expansion drill program at the Tonopah West project. The program is designed to test a potential 1,200-metre extension of mineralization eastward from the existing DPB South Resource area.

Key results include drill hole TXC25-166, which intersected 5.03 metres grading 750 g/t silver equivalent (AgEq), including a higher-grade zone of 1.83 metres of 1,661 g/t AgEq. Other holes returned thick, lower-grade zones of mineralization, such as 8.75 metres of 193 g/t AgEq in hole TXC25-159. The company has completed the 24-hole, 6,798-metre program, and assays for an additional 13 drill holes are still pending. CEO Andrew Pollard stated this emerging zone represents significant tonnage potential that could meaningfully expand the project's mineral resource base.

The news is materially positive as it successfully confirms the company's geological model and demonstrates the potential to significantly expand the resource at Tonopah West. The results, particularly the high-grade intercept in TXC25-166, validate the strategy of stepping out along the interpreted mineralized trend.

This program has been clearly telegraphed. A scout drilling program announced in March 2025 first identified this 1.2 km eastern trend with high-grade hits. The company then announced the formal commencement of this follow-up "Eastern Expansion Program" in July 2025. Today's results are the first assays from that follow-up program and confirm the presence of both high-grade and broad zones of mineralization.

While these results are strong and encouraging, they are an incremental step in a larger, ongoing exploration effort. They are in line with expectations set by the earlier scout drilling and do not fundamentally alter the investment thesis, but rather strengthen it. The confirmation of a large, mineralized footprint is a key de-risking event. The full impact will be realized when these results are incorporated into the next mineral resource estimate and the updated Preliminary Economic Assessment (PEA), which are the key upcoming catalysts.

Blackrock Silver Corp. is a Canadian-based mineral exploration company focused on its 100%-owned Tonopah West silver-gold project, located in the Walker Lane trend of west-central Nevada, a Tier-1 mining jurisdiction. The project is adjacent to the historic Tonopah silver district.

The flagship Tonopah West project is being advanced through systematic exploration and de-risking. The company's strategy involves: 1. M&I Conversion Drilling: Infill drilling to upgrade the confidence of existing inferred resources to the measured and indicated categories, which de-risks the early years of a potential mine plan. 2. Resource Expansion Drilling: Step-out drilling to grow the overall size of the deposit by connecting known resource areas (e.g., DPB and NW Step Out) and testing new targets (e.g., Eastern Expansion). 3. Economic Studies: A Preliminary Economic Assessment (PEA) was published in 2024, and an updated PEA is planned for Q1 2026. 4. Permitting and Development: The company has initiated baseline studies required for permitting an underground exploration decline, with a goal to begin construction in 2027.