Island Park Reservoir Fishing and Stocking
Fremont County, Idaho. The Idaho Department of Fish and Game lists 1 stocking here in the latest year of its data (Rainbow Trout), the most recent on May 20, 2026. Stocked in May and June in two or more years.
2026 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| May 20, 2026 | Rainbow Trout | 18,720 | Catchable (12-14 inches) |
2025 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Sep 30, 2025 | Rainbow Trout | 2,672 | Catchable (12-14 inches) |
| Sep 26, 2025 | Rainbow Trout | 5,148 | Catchable (12-14 inches) |
| Jun 18, 2025 | Rainbow Trout | 10,605 | Catchable (12-14 inches) |
| May 13, 2025 | Rainbow Trout | 7,968 | Catchable (12-14 inches) |
2024 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Oct 2, 2024 | Rainbow Trout | 13,270 | Catchable (12-14 inches) |
| Jun 24, 2024 | Rainbow Trout | 9,180 | Catchable (12-14 inches) |
| Jun 18, 2024 | Rainbow Trout | 3,600 | Catchable (12-14 inches) |
| May 30, 2024 | Rainbow Trout | 9,632 | Catchable (12-14 inches) |
Other Stocked Waters in Fremont 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 “Island Park 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.