Vancouver, British Columbia--(Newsfile Corp. - November 4, 2025) - Ridgeline Minerals Corp. (TSXV: RDG) (OTCQB: RDGMF) (FSE: 0GC0) (" Ridgeline " or the " Company ") is pleased to announce a new high-grade zinc ("Zn") - silver ("Ag") - gold ("Au") - lead ("Pb") - copper ("Cu") - antimony ("Sb") massive sulfide carbonate replacement ("CRD") discovery in the second hole of the Company's maiden drill program testing the Chinchilla Sulfide target at the Selena project ("Selena" or "The Project"), Nevada. Drilling has intersected multiple massive sulfide horizons to-date with full assay results for core hole SE25-052A as well as assays for the first two of four massive sulfide intervals in SE25-053, which are highlighted below (Picture 1 & Figure 1 ).

The Project is currently being operated by Ridgeline under Phase 1 of an earn-in agreement with a wholly owned subsidiary of South32 Limited. ("South32"), where South32 may earn up to an 80% interest in the Project by executing all earn-in agreement milestones (see August 22, 2024 news release HERE ).

Picture 1: Representative core photos of the massive sulfide zone in SE25-053 that returned a highlight intercept of 8.6m grading 10.4% Zn, 21.1 g/t Ag, 0.3% Pb, 0.1% Cu, 0.1 g/t Au, 0.1% Sb within 17.4m grading 6.0% Zn, 35.6 g/t Ag, 0.2 g/t Au, 0.5% Pb, 0.1% Cu, 0.1% Sb starting at 958.0m downhole

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Chad Peters, Ridgeline's President, CEO & Director commented, "This is an exciting day for Ridgeline with our maiden drill program at the Chinchilla Sulfide target delivering a high-grade CRD discovery. Hole SE25-053 has intersected multiple massive sulfide horizons within the kilometer-scale MT anomaly that defines the Chinchilla Sulfide target, suggesting the potential to delineate a polymetallic CRD deposit of considerable scale. This discovery is just getting started and I'd like to congratulate our technical team, led by Ridgeline's Vice President of Exploration Michael Harp, as well as our partners at South32 who shared in our belief that the Selena Project had the potential to host a blind CRD system at depth."

Mr. Peters continues, "With zinc, silver, copper and antimony all designated as critical metals by the U.S. government, Selena is uniquely positioned in the State of Nevada as a future domestic supplier of precious and critical metals. Drilling will continue through the end of the year, and we will provide regular updates as assays are received for this rapidly evolving discovery."

Figure 1: Plan view map showing the Chinchilla Sulfide CRD discovery in hole SE25-053 at the southern end of a kilometer-scale MT anomaly (coloured contours) that outlines the Chinchilla Sulfide target

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SE25-053 Highlights

Drillhole SE25-053 returned the first massive sulfide intercepts in the project's history with a highlight intercept of:

• 1.1m grading 27.0% Zn, 60.1 g/t Ag, 1.5 g/t Au, 0.7% Pb, 0.4% Cu and 0.03% Sb (766.4 g/t silver equivalent ("AgEq") or 31.9% zinc equivalent ("ZnEq")) starting at 942.4m downhole (Figure 2 & Picture 1 )
• And; 17.4 meters grading 6.0% Zn, 35.6 g/t Ag, 0.2 g/t Au, 0.5% Pb, 0.1% Cu, and 0.1% Sb (219.9 g/t AgEq or 9.2% ZnEq) starting at 958.0m downhole (Figure 2 and Figure 3 )
  • Including, 8.6 meters grading 10.4% Zn, 21.1 g/t Ag, 0.3% Pb, 0.1% Cu, 0.1 g/t Au, 0.1% Sb (273.6 g/t AgEq or 11.4% ZnEq)
  • And, 0.4m grading 4.2% Zn, 379.0 g/t Ag, 1.2 g/t Au, and 7.2% Pb (586.4 g/t AgEq or 24.4% ZnEq)
• Mineralization occurs as classic CRD, replacement style semi-massive to massive sulfides with a primary metal assemblage of Sphalerite-Pyrrhotite-Pyrite-Galena-Chalcopyrite (listed in order of relative abundance) (Picture 1)
• Massive sulfide horizons intercepted to-date range from 0.5m - 17.4m thick and are hosted within the favourable host rocks of the Guilmette Limestone (Chinchilla Oxide Zone host)
  • Individual assay samples grading up to 27.0% Zn, 379.0 g/t Ag, 7.2% Pb, 1.5 g/t Au, 0.4% Cu and 2.6% Sb highlight the high-grade nature of the discovery

SE25-053 Next Steps

• Two additional massive sulfide horizons have been intersected (assays pending) beneath the upper sulfide zone ranging from 6.0- 8.7m thick and exhibit similar zinc-rich metal assemblages
  • The lower portion of hole SE25-053 is currently drilling ahead at 1,304 depth to test the core of the MT anomaly (25 ohm.m) where it is projected to intersect the Simonson Dolomite formation (potential host rock).
    • The Company intends to terminate the hole between 1,350 - 1,400m depth

Figure 2: Simplified Long-Section A-A' showing the high-grade SE25-053 discovery (assays pending on lower massive sulfide zones)

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Figure 3: Simplified Chinchilla Sulfide X-Section B-B' looking east showing high-grade discovery hole SE25-053. SE25-052A did not adequately test the MT anomaly at a favourable orientation

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SE25-052A Highlights

Drillhole SW25-052A intercepted widespread calcite crackle breccias with intense BBQ rock (Picture 2 ), low-grade silver, and anomalous CRD pathfinder elements (Mn-Pb-Zn-As-Sb) over 250 continuous meters in the core of the MT anomaly.

• Reportable intercepts include 25.6m grading 4.0 g/t Ag, including 0.8m grading 30 g/t Ag and 0.2% Zn starting at 605.0m downhole (Figure 3 )
  • And, 0.3m grading 43.8 g/t Ag starting at 984.0m downhole
• The Company interprets this intersection as a proximal hit to the main CRD system with hole SE25-052A drilling back to the west and along the outer margin of the MT anomaly
  • This interpretation is further supported by SE25-053 which successfully intersected massive sulfide CRD mineralization by drilling to the east and directly across the MT anomaly

SE25-052A Next Steps

• Future drilling from this drill pad will focus on drilling back to the east to intersect the MT anomaly from a more favourable orientation

Picture 2: Core photos of CRD "BBQ Rock" in SE25-052A. Shortwave UV fluorescence highlights CRD pathfinders (Mn-Pb-Zn-As-Sb) in calcite veining, which are proximal indicators of CRD mineralization

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Table 1: Table of significant assays for SE25-052A and SE25-053

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