Integra Resources Announces Drilling Results From Florida Canyon Mine In Nevada That Have Potential To Expand Mineral Resources

• Opportunity 1: Near-surface oxide potential from historical dump material: Drilling targeting large volumes of historical, gold-mineralized, low-grade waste material that was below the mining cut-off in a significantly lower gold-price environment. These areas demonstrate a significant near-term opportunity to increase mineral resources and potentially extend mine life at Florida Canyon.
  • Broad oxide gold intercepts from historical South Mine Dump ("South Dump") material, including:
    • FCM25-0655: 0.30 grams per tonne ("g/t") gold ("Au") over 102.1 m
    • FCMR25-0896: 0.22 g/t Au over 103.6 m
    • FCMR26-0908: 0.26 g/t Au over 91.4 m       
    • FCMR26-0954: 0.55 g/t Au over 54.9 m
    • FCMR25-0893: 0.23 g/t Au over 91.4 m       
    • ~67% of drill intercepts exceed the current mine cut-off grade of 0.11 g/t Au
• Opportunity 2: Expand in-situ resources between existing mine open pits: Drilling targeting "saddle" and "ridge" ("Inter-Pit") areas located between active and historical pits. Many of these areas have been sparsely drilled historically and offer meaningful growth potential directly adjacent to current and future mining phases.
  • Significant thickness from near-mine in-situ drilling at the Radio Tower Pit, including:
    • 2025-Met-R02: 0.32 g/t Au over 138.1 m
    • 2025-GT-R03: 0.42 g/t Au over 58.5 m
    • 2025-GT-R05: 0.53 g/t Au over 44.3 m
    • ~26% of drill intercepts within the Radio Tower Pit exceed the current Radio Tower cut-off grade of 0.14 g/t Au
  • Additional thick intercepts from the C7 / Central Pit area highlighting strong vertical continuity, including:
    • FCM25-0617: 0.36 g/t Au over 128.0 m
    • 2025-GT-C01: 0.82 g/t Au over 50.0 m
    • 2025-GT-C04: 0.48 g/t Au over 97.5 m
    • ~38% of drill intercepts within the C7 / Central Pit area exceed the current cut-off grade of 0.11 g/t Au

Key Observations:

• Mineralization defined in close proximity to existing pits and infrastructure has the potential to enhance economic value.
• Results continue to support a growing inventory of near-surface mineralization expected to contribute to future resource and reserve growth and to extend mine life.
• Strong continuity across multiple intercepts exceeding 40 m at >0.2 g/t Au, reinforcing potential for pit expansion and near-term mine planning.
• Strong grade continuity across wide intervals.
• Strong alignment with heap leach processing characteristics.