Lakes / Montana / Fish Species / Yellowstone Cutthroat Trout X Westslope Cutth.
Montana Lakes With Yellowstone Cutthroat Trout X Westslope Cutth.
13 counted Montana lakes list Yellowstone Cutthroat Trout X Westslope Cutth. in Montana Fish, Wildlife & Parks records. The largest is Ruby River Reservoir at 941 acres.
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Ruby River Reservoir | Madison | 941 acres | - |
| 2 | Sunburst Lake | Flathead | 148 acres | About 200 ft |
| 3 | Flotilla Lake | Flathead | 147 acres | - |
| 4 | George Lake | Missoula | 114 acres | - |
| 5 | Grace Lake | Flathead | 82 acres | - |
| 6 | Koessler Lake | Missoula | 81 acres | - |
| 7 | Arrow Lake | Flathead | 59 acres | - |
| 8 | Rock Lake | Sanders | 47 acres | - |
| 9 | Tendoy Lake | Beaverhead | 21 acres | About 90 ft |
| 10 | Forest Lake | Meagher | 21 acres | - |
| 11 | Fish Lake | Flathead | 8 acres | - |
| 12 | Snowshoe Lakes | Lincoln | 5 acres | - |
| 13 | Rhoda Lake | Judith Basin | 3 acres | - |
Source: Montana Fish, Wildlife & Parks lake data. Verified October 30, 2026.