MT
Ostle Reservoir
LakeMT
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About this water
Ostle Reservoir is a reservoir in Montana. State records show it stocked 46 times between 2002 and 2025. The most-stocked species are rainbow trout and tiger muskie. 56,365 rainbow trout have gone in across 43 releases.
Stocking history
46 recorded stockings
| Date | Species | Number | Size | Hatchery |
|---|---|---|---|---|
| Jun 26, 2025 | Rainbow Trout · Arlee | 1,000 | 6.0" | Giant Springs Trout Hatchery |
| Jun 26, 2025 | Rainbow Trout · Eagle Lake | 1,200 | 3.7" | Giant Springs Trout Hatchery |
| Jun 27, 2024 | Rainbow Trout · Eagle Lake | 1,020 | 4.0" | Big Springs Trout Hatchery |
| Jun 5, 2024 | Rainbow Trout · Eagle Lake | 1,000 | 3.3" | Giant Springs Trout Hatchery |
| Jun 5, 2024 | Rainbow Trout · Arlee | 1,000 | 5.5" | Giant Springs Trout Hatchery |
| Jun 27, 2023 | Rainbow Trout · Arlee | 1,000 | 5.7" | Giant Springs Trout Hatchery |
| Jun 27, 2023 | Rainbow Trout · Eagle Lake | 1,000 | 3.3" | Giant Springs Trout Hatchery |
| Jun 14, 2023 | Rainbow Trout · Eagle Lake | 1,000 | 3.9" | Big Springs Trout Hatchery |
| Oct 26, 2022 | Tiger Muskie (Northern X Muskie) · Nebraska | 20 | 8.4" | Miles City Fish Hatchery |
| Jun 27, 2022 | Rainbow Trout · Eagle Lake | 930 | 3.8" | Giant Springs Trout Hatchery |
| Jun 27, 2022 | Rainbow Trout · Arlee | 1,000 | 6.1" | Giant Springs Trout Hatchery |
| Jun 16, 2022 | Rainbow Trout · Eagle Lake | 1,016 | 3.4" | Big Springs Trout Hatchery |
Showing the 12 most recent of 46. Stocking records for Ostle Reservoir published by Montana Fish, Wildlife & Parks. Stocking does not guarantee fish are present. Check current regulations and access before you go. See the full Montana stocking report.
