Ostle Reservoir Fishing and Stocking
Montana. Montana Fish, Wildlife & Parks lists 3 stockings here in the latest year of its data (Rainbow Trout and Tiger Muskie (Northern X Muskie)), the most recent on Sep 11, 2026. Stocked in June in two or more years.
2026 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Sep 11, 2026 | Rainbow Trout | 1 | 4.04 in |
| Sep 11, 2026 | Rainbow Trout | 1 | 3.97 in |
| Jul 23, 2026 | Tiger Muskie (Northern X Muskie) | 35 | 7.36 in |
2025 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Jun 26, 2025 | Rainbow Trout | 1,200 | 3.7 in |
| Jun 26, 2025 | Rainbow Trout | 1,000 | 6.02 in |
2024 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Jun 27, 2024 | Rainbow Trout | 1,020 | 3.96 in |
| Jun 5, 2024 | Rainbow Trout | 1,000 | 5.5 in |
| Jun 5, 2024 | Rainbow Trout | 1,000 | 3.30 in |
About This Data
Every row comes from the stocking information published by Montana Fish, Wildlife & Parks, checked Nov 3, 2026. The agency lists this water as “Ostle Reservoir (; Antelope Butte)”. Species and sizes are given as the agency names them; a dash means the agency does not say.
More for Montana Anglers
Stocking dates and places can change without notice; check with the agency before a trip. ReelTourney is not affiliated with Montana Fish, Wildlife & Parks.