Lakes / Montana / Tongue River Reservoir
Tongue River Reservoir, Montana
2,112 acres
Surface Area
3,427.6 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Montana
45.10 degrees N, 106.79 degrees W - Big Horn County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Montana Fish, Wildlife & Parks coordinates, not by eye. Schematic - not a survey map.
How Tongue River Reservoir Stacks Up
- About 96 miles from Billings, as the crow flies.
- 25 fish species on the FWP list for this lake.
Fish Species
Black BullheadBlack CrappieBluegillBrown TroutChannel CatfishCommon CarpFathead MinnowGolden ShinerGreen SunfishLargemouth BassLongnose DaceLongnose SuckerNorthern PikePumpkinseedRock BassSaugerShorthead RedhorseSmallmouth BassSpottail ShinerStonecatWalleyeWhite CrappieWhite SuckerYellow BullheadYellow Perch
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID120027855
CountyBig Horn
Coordinates45.0954, -106.7898
Largest Lakes in Montana
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Fort Peck Lake | Valley | 233,053 acres | - |
| 2 | Flathead Lake | Lake | 122,132 acres | About 380 ft |
| 3 | Canyon Ferry Lake | Broadwater | 32,773 acres | About 170 ft |
| 4 | Lake Koocanusa | Lincoln | 28,723 acres | - |
| 5 | Hungry Horse Reservoir | Flathead | 23,577 acres | - |
Sources: Montana Fish, Wildlife & Parks lake data (ID 120027855). Verified October 30, 2026.