Mr. Chad Peters reports

RIDGELINE MINERALS INITIATES DRILL PROGRAM AT THE CHINCHILLA SULFIDE CRD DISCOVERY, SELENA PROJECT

Ridgeline Minerals Corp. has initiated the company's 2026 partner-financed drill program at the Chinchilla sulphide carbonate replacement (CRD) discovery at the Selena project.

Drilling will take a phased approach in 2026 with the program starting with three deep holes targeting the Chinchilla sulphide discovery:

• SE26-055 is a 250-metre stepout to the northeast of 2025 discovery hole SE25-053 which intersected multiple lenses of massive sulphide CRD style mineralization ranging from 1.1 to 17.4 m thick including highlight intercepts of 1.1 m grading 27.0 per cent Zn (zinc), 60.1 g/t (grams per tonne) Ag (silver), 0.7 per cent Pb (lead), 1.5 g/t Au (gold), 0.4 per cent Cu (copper), 0.03 per cent Sb (antimony) (766.4 g/t AgEq (silver equivalenlt) or 31.9 per cent ZnEq (zinc equivalent)) starting at 943 m downhole, true thickness unknown:
  • And: 17.4 metres grading 6.0 per cent Zn, 35.6 g/t Ag, 0.5 per cent Pb, 0.2 g/t Au, 0.1 per cent Cu, 0.1 per cent Sb (219.9 g/t AgEq or 9.2 per cent ZnEq);
  • And: 8.7 metres grading 7.0 per cent Zn, 13.9 g/t Ag, 0.3 per cent Pb, 0.1 g/t Au, 0.1 per cent Cu, 0.01 per cent Sb (175.5 g/t AgEq or 7.3 per cent ZnEq) (see Dec. 18, 2025, press release).
• SE26-056 will test between SE25-053 and the company's 2022 RC (reverse circulation) drill hole SE22-038 that intercepted 1.5 m grading 97.4 g/t Ag, 4.9 per cent Zn, 0.1 per cent Pb and 0.4 g/t Au in the same oxide upper horizon as SE25-054 (see March 16, 2026, PR) but did not drill deep enough to test the projection of the same sulphide CRD horizon that was intercepted in SE25-053.
• SE26-057 will test a new target concept adjacent to the Butte Valley Cu-Au-Ag-Zn porphyry system with the goal of intersecting copper-silver enriched skarn mineralization that is projected along the margins of the Butte Valley porphyry.
• Borehole electromagnetic (BHEM) surveys will be completed in early-mid June in holes SE25-053 and SE25-054 to assist in the 3-D modelling of conductive sulphide-rich zones at depth and laterally from the drill holes. It is anticipated that results from the BHEM surveys will help guide additional future drilling at the project.

About Selena

The Selena project is a silver-lead-zinc-gold-copper plus or minus antimony carbonate replacement (CRD) style exploration project operated by Ridgeline Minerals and financed by a wholly owned subsidiary of South32 Ltd. The project is currently operating under phase I of an exploration earn-in agreement totalling up to $10-million (U.S.) in qualifying expenditures over a five-year period. South32 has spent approximately $5.6-million (U.S.) in qualifying expenditures through year 2 of the earn-in agreement and approved a year 3 work program and budget of $4.4-million (U.S.). This budget, once financed and executed, is expected to satisfy phase I of the exploration earn-in agreement (for more details see Aug. 22, 2024, press release).

QA/QC (quality assurance/quality control) procedures

Selena HQ and NQ size core samples are split by core saw with one-half the sample retained at the company warehouse and the other one-half bagged and submitted to American Assay Laboratories (AAL) of Sparks, Nev., which is a certified and accredited laboratory, independent of the company. Independent check samples are shipped to Paragon Geochemical Labs (PAL) of Sparks, Nev. Samples are prepared using industry-standard prep methods and analyzed using FA-PB30-ICP (Au; 30 g fire assay) and ICP-5AM48 (48 -element suite; 0.5 g five-acid digestion/ICP-MS) methods. AAL also undertakes its own internal coarse and pulp duplicate analysis to ensure proper sample preparation and equipment calibration. Ridgeline's QA/QC program includes regular insertion of CRM standards, duplicates and blanks into the sample stream with a stringent review of all results completed by the company's qualified person, Michael T. Harp, vice-president, exploration.

Technical information contained in this news release has been prepared under the supervision of, and approved by, Michael T. Harp, CPG, the company's vice-president, exploration. Mr. Harp is a qualified person under National Instrument 43-101 -- Standards of Disclosure for Mineral Projects.

About Ridgeline Minerals Corp.

Ridgeline Minerals is a discovery focused precious and base metal explorer with a proven management team and a 200-square-kilometre exploration portfolio across seven projects in Nevada, U.S. The company is a hybrid explorer with a mix of 100-per-cent-owned exploration assets (Big Blue, Atlas, Bell Creek and Coyote) as well as two earn-in exploration agreements with Nevada Gold Mines at its Swift and Black Ridge projects, and a third earn-in with South32 at its Selena project totalling up to $60-million (U.S.) in partner-financed exploration expenditures.

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