Mosquito Flat Reservoir Fishing and Stocking
Custer County, Idaho. The Idaho Department of Fish and Game lists 4 stockings here in the latest year of its data (Kokanee and Rainbow Trout), the most recent on Sep 1, 2026. Stocked in June, July and September in two or more years.
2026 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Sep 1, 2026 | Rainbow Trout | 1,475 | Catchable (6+ inches) |
| Jul 7, 2026 | Rainbow Trout | 1,029 | Catchable (6+ inches) |
| Jun 8, 2026 | Kokanee | 5,763 | Fry (0-3 inches) |
| Jun 8, 2026 | Rainbow Trout | 1,992 | Catchable (12-14 inches) |
2025 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Sep 24, 2025 | Rainbow Trout | 58,500 | Fingerling (3-6 inches) |
| Sep 2, 2025 | Rainbow Trout | 1,674 | Catchable (6+ inches) |
| Jul 9, 2025 | Rainbow Trout | 1,032 | Catchable (6+ inches) |
| Jun 4, 2025 | Rainbow Trout | 2,014 | Catchable (6+ inches) |
2024 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Aug 1, 2024 | Rainbow Trout | 1,343 | Catchable (12-14 inches) |
| Jul 18, 2024 | Rainbow Trout | 668 | Catchable (12-14 inches) |
| Jun 10, 2024 | Rainbow Trout | 1,015 | Catchable (12-14 inches) |
Other Stocked Waters in Custer 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 “Mosquito Flat Reservoir”. 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.