Bayhorse Silver Confirms Strike Extensions 150 Meters (492ft) of Silver Mineralization at the Bayhorse Silver Mine, Oregon, USA. Plans Additional Underground Drilling Program to Extend New High Grade Drift Zone. Posts Baseline Permit Studies to Website

Rhea-AI Summary

Bayhorse Silver has confirmed significant silver mineralization extensions at its Oregon mine, with the strike length now extending 150 meters beyond existing workings for a total of nearly 500 meters. The company discovered a new high-grade 'Drift Zone' parallel to the main haulage way, with impressive sample grades up to 192.35 oz/t silver and 10.7% copper. The company plans additional underground drilling to explore this zone, which is estimated to be at least 10 meters wide. The mine, which historically produced high-grade silver (up to 240 oz/ton) along with copper, antimony, and zinc, was previously closed in 1984 due to low silver prices. With current silver prices reaching US$37 per ounce, Bayhorse is accelerating exploration efforts and working towards completing its final Operating Permit application.

Positive

• Confirmed 150-meter extension of silver mineralization, expanding total strike length to 500 meters
• Discovery of new high-grade Drift Zone with samples showing up to 192.35 oz/t silver and 10.7% copper
• Current high silver prices of US$37/oz make the project more economically viable compared to $5/oz closure price in 1984
• Project contains critical minerals including copper, antimony, and zinc in addition to silver

Negative

• Poor ground conditions caused abandonment of two drill holes (BHD25-001 and BDH25-002)
• Final Operating Permit not yet obtained
• Current financing still in progress, required for planned drilling program
• Surface samples may not represent true values according to company disclosure

Vancouver, British Columbia--(Newsfile Corp. - June 11, 2025) - Bayhorse Silver Inc, (TSXV: BHS) (OTCQB: BHSIF) (FSE: 7KXN) (the "Company" or "Bayhorse") reports that recent drilling, and a review of drill holes MW2, and MW3 has confirmed Bayhorse silver mineralization is epithermal in nature and has been identified as extending 150 meters beyond the most westerly extent of the existing underground workings for a total east-west strike length of nearly 500 meters (1640 ft). (BHS2024.14)

Figure 1. Identified strike extensions of Bayhorse silver mineralization

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/5015/255243_1ca2d3b3041e2af6_001full.jpg

Underground diamond drilling is planned from drilling stations in the most westerly extent of the historic main east-west haulage way into the new high grade "Drift Zone" that lies parallel to, and 20 to 30 meters (65-100 ft) to the south of the haulage way. The new Drift Zone is estimated to be a minimum 10 meters in width, similar to other mined zones in the Bayhorse Mine.

Three panel samples were taken across the westerly face of the Drift Zone. These samples graded*:192.35 oz/t (5,984.72 g/t) silver and 10.7% copper., 50.88 oz/t (1,582.54 g/t) silver and 4.51% copper, and 3.3 oz/t (102.64 g/t) silver and 1.72% copper. (*surface samples are considered select samples and may not represent true values). (BHS2024-11)

Figure 2. Planned drilling to determine extent of new, high grade, mineralized "Drift Zone" south of historic main haulage way.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/5015/255243_1ca2d3b3041e2af6_002full.jpg

The new "Drift Zone" was discovered when driving the new access tunnel to safely access the historic Big Dog high grade zone. Sampling identified silver mineralization on its south wall and the new drift was started extending to the west and south of the Big Dog access tunnel.

While silver mineralization has been encountered 30 meters (100 ft) east of and below the historic Sunshine stope, diamond drill holes BHD25-001 and BDH25-002 targeted to the east of the historic Sunshine stope were abandoned due to poor ground conditions encountered while drilling. A new drill hole (BHD25-008) using the larger underground drill targeting the estimated 35 - 40 meters (115 - 132 ft) strike length of the zone is planned to drill test this target.

Significant volumes of sulfosalts containing high grade silver, up to 240 ounces per ton, along with the critical minerals, copper, antimony and zinc, were mined from the Bayhorse Silver Mine before being closed in late 1984 due to low silver prices (<$5 per ounce) (Silver King Mines, 1984). Silver, copper, antimony and zinc mineralization both in the form of dark grey "massive" sulfosalts has been identified underneath the historic Junction stope and in veins and stockworks west of the Big Dog stope over a strike length of between 130 - 150 m (427 - 495 ft) (National Instrument 43-101 inferred resource of 292,300 tons at a grade of 21.65 opt (673 g/t) for 6.3 m ounces of silver.) (Turner et al. 2018).

Bayhorse CEO Graeme O'Neill comments that, "with silver prices reaching as high as US$37 per ounce this week, drilling to confirm the westward extent of high grade silver mineralization becomes a major focus and will commence as soon as possible upon completion of our current financing. We have posted on the Bayhorse website many of the completed baseline studies required for the final Operating Permit application and are working to complete the final application."

This News Release has been prepared on behalf of the Bayhorse Silver Inc. Board of Directors, which accepts full responsibility for its content. Mark Abrams, AIPG, a Qualified Person, and a Director of the Company, has prepared, supervised the preparation of, or approved the technical content of this news release.

On Behalf of the Board.

Graeme O'Neill, CEO
866-399-6539

About Bayhorse Silver Inc.

Bayhorse Silver Inc. is an exploration and production company with a 100% interest in the historic Bayhorse Silver Mine located in Oregon, USA and the Pegasus Project, in Washington County, Idaho. The Bayhorse Silver Mine and the Pegasus Project lies 44 km southwest of Hercules Metals' porphyry copper discovery. The Bayhorse Mine includes a state-of-the-art Steinert Ore-Sorting technology reducing waste rock entering the processing stream by up to 85%. The Company has created a minimum environmental impact facility capable of mining 200 tons of mineralization per day and the ability to process and supply 3,600 tons per year of silver/copper concentrate ranging between 7,500 to 15,000 g/t using standard flotation processing at its milling facility in nearby Payette County, Idaho, USA, with an offtake agreement in place with Ocean Partners UK Limited. The Company has an experienced management and technical team with extensive mining expertise in both exploration and building mines.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/255243

FAQ

What are the recent exploration results at Bayhorse Silver Mine (BHSIF)?

Recent drilling confirmed silver mineralization extending 150 meters beyond existing workings, with a total strike length of 500 meters. A new high-grade Drift Zone was discovered with samples up to 192.35 oz/t silver and 10.7% copper.

What is the historical significance of the Bayhorse Silver Mine?

The mine historically produced high-grade silver up to 240 ounces per ton along with copper, antimony, and zinc before closing in 1984 due to low silver prices below $5 per ounce.

What is the current resource estimate for BHSIF's Bayhorse Silver Mine?

The mine has a National Instrument 43-101 inferred resource of 292,300 tons at a grade of 21.65 opt (673 g/t) for 6.3 million ounces of silver.

What are Bayhorse Silver's (BHSIF) next steps for the mine development?

The company plans to commence underground drilling to explore the new Drift Zone upon completion of current financing, while working to complete the final Operating Permit application.

What critical minerals are present at the Bayhorse Silver Mine?

The mine contains silver as the primary mineral, along with critical minerals including copper, antimony, and zinc.