As of December 2025
The top 10 largest gold mines in Canada are primarily concentrated in Ontario and Quebec. The chart below lists Canada’s largest gold mines, ownership and approximate closure dates. Most have closure horizons stretching into the 2030s or later, with some expected to operate past 2040.
| Rank | Mine | Province | Owner | Likely Closure Date |
| 1 | Detour Lake | Ontario | Agnico-Eagle Mines | Expansion plans to extend life beyond 2040 |
| 2 | Canadian Malartic (Odyssey Complex) | Quebec | Agnico-Eagle Mines | Open-pit Barnat closes 2029; Odyssey underground closes 2042 |
| 3 | Meadowbank-Amaruq Complex | Nunavut | Agnico-Eagle Mines | Scheduled 2028; may be extended |
| 4 | Musselwhite | Ontario | Orla Mining (acquired from Newmont in 2025) | No fixed closure date; reserves support 2035 |
| 5 | Eleonore | Quebec | Dhilmar Ltd (acquired from Newmont in 2025) | Still early in mine life; likely last into 2030s |
| 6 | Porcupine Complex | Ontario | Discovery Silver (acquired from Newmont in 2025) | Likely 2035 or later |
| 7 | Hemlo | Ontario | Hemlo Ming (Carcetti Capital, acquired from Barrick in 2025) | Mature mine; new ownership suggests at least to 2037 |
| 8 | Westwood | Quebec | IAMGOLD | Life of mine extended to 2032 |
| 9 | Island Gold | Ontario | Alamos Gold | Expansion plans to support production to 2037 |
| 10 | Brucejack | British Columbia | Newmont Corporation | Closure scheduled for 2035 |
Key notes:
- Detour Lake and Canadian Malarctic are Canada’s flagship mines with production horizons stretching 15- 20+ years.
- The most time-sensitive near-term closure is Meadowbank-Amaruk, with closure expected in 2028
- Agnico-Eagle (Canadian) and Newmont (U.S.) are the clear leaders, with diversified assets across multiple provinces.
Gold Proficiency
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