Mr. Eric Saderholm reports

SECOND DRILL RIG ARRIVES AT AMERICAN PACIFIC MINING'S MADISON COPPER-GOLD PROJECT AND COMMENCES DRILLING NEAR-SURFACE SKARN TARGETS

A second drill rig has arrived on site and is now turning at American Pacific Mining Corp.'s 100-per-cent-owned Madison copper-gold project in Montana to test near-surface skarn targets.

The reverse circulation (RC) drill rig commenced drilling as part of the continuing, fully financed 15,000-metre program, which includes both diamond core and RC drilling, that began in early June (see June 1, 2026, news release). The 2026 drilling campaign at Madison is designed to aggressively test both near-surface skarn targets and deeper porphyry-style mineralization that management believes has the potential to underpin a large copper-gold system.

The RC drill will focus on rapid, cost-effective testing of a series of near-surface skarn targets that share key geological characteristics with the historic Madison and Broadway mine footprint, an area with a history of high-grade copper and gold production. These targets are designed to build on past work and aim to identify additional shallow, potentially high-grade mineralization that could contribute to the first mineral resource estimate targeted for 2027. Success in this phase of the program could demonstrate the potential to grow the known mineralized footprint around the existing skarn system.

The staged RC and core strategy is intentionally designed to advance near-surface target testing in parallel with deeper system-scale exploration, providing investors with exposure to both potential shallow ounces and larger porphyry-style upside within the same drill program.

"With RC drilling now under way to test multiple near-surface skarn targets and the core rig already stepping into the deeper porphyry environment, we are now in a position to generate steady results through the summer and, we hope, demonstrate the true scale of this system," commented managing director of exploration Eric Saderholm. "If we are successful in extending the known mineralization and vectoring into a larger copper-gold system, we believe Madison has the potential to become a cornerstone asset that can drive meaningful value for our shareholders."

See the June 1, 2026, news release for full details of the 15,000-metre drill program. Additional updates will be provided as drilling advances.

Qualified person statement

Technical aspects of this press release have been reviewed and approved by the designated qualified person under National Instrument 43-101, Eric Saderholm, PGeo, managing director of exploration for the company.

About American Pacific Mining Corp.

American Pacific Mining is a precious and base metals explorer and developer focused on opportunities in the Western United States. The company's flagship asset is the 100-per-cent-owned past-producing Madison copper-gold project in Montana. For the Madison transaction, American Pacific was selected as a finalist in both 2021 and 2022 for Deal of the Year at the S&P Global Platts Metals Awards, an annual program that recognizes exemplary accomplishments in 16 performance categories. Through a 2025 transaction with Vizsla Copper, American Pacific has established a major equity position with milestone upside exposure to the advanced exploration-stage Palmer copper-zinc VMS (volcanogenic massive sulphide) project in Alaska. American Pacific also holds a significant equity position in ICG Silver & Gold through a spinout of the Tuscarora district project in Nevada. Several additional high-grade precious metals projects located in key mining districts in Nevada remain in the asset portfolio. The company's mission is to provide shareholders with discovery and exploration upside exposure across its portfolio through partnerships, spinouts and direct exploration.

American Pacific is incorporated pursuant to the laws of British Columbia and its head office is located at suite 910, 510 Burrard St., Vancouver, B.C., V6C 3A8.

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