Big Trinity Lake Fishing and Stocking
Elmore County, Idaho. The Idaho Department of Fish and Game lists 3 stockings here in the latest year of its data (Cutthroat Trout - Westslope and Rainbow Trout), the most recent on Sep 10, 2026. Stocked in July, August and September in two or more years.
2026 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Sep 10, 2026 | Cutthroat Trout - Westslope | 4,003 | Fry (0-3 inches) |
| Aug 4, 2026 | Rainbow Trout | 798 | Catchable (6+ inches) |
| Jul 29, 2026 | Rainbow Trout | 2,413 | Catchable (12-14 inches) |
2025 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Sep 8, 2025 | Cutthroat Trout - Westslope | 3,981 | Fry (0-3 inches) |
| Jul 16, 2025 | Rainbow Trout | 3,285 | Catchable (12-14 inches) |
2024 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Sep 6, 2024 | Cutthroat Trout - Westslope | 4,016 | Fry (0-3 inches) |
| Aug 29, 2024 | Rainbow Trout | 1,320 | Catchable (6+ inches) |
| Aug 20, 2024 | Rainbow Trout | 1,162 | Catchable (12-14 inches) |
| Jul 22, 2024 | Rainbow Trout | 1,050 | Catchable (12-14 inches) |
Other Stocked Waters in Elmore County
About This Data
Every row comes from the stocking information published by the Idaho Department of Fish and Game, checked Oct 20, 2026. The agency lists this water as “Big Trinity Lake”. Species and sizes are given as the agency names them; a dash means the agency does not say.
More for Idaho Anglers
Stocking dates and places can change without notice; check with the agency before a trip. ReelTourney is not affiliated with the Idaho Department of Fish and Game.