Lake Helena, Montana
2,073 acres
Surface Area
About 12 ft
Max Depth (Approximate)
3,647.36 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Montana
46.70 degrees N, 111.93 degrees W - Lewis and Clark 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.
Depth Profile - Lake Helena
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map. Max depth is approximate, from state bathymetry.
How Lake Helena Stacks Up
- About 64 miles from Great Falls, as the crow flies.
- 18 fish species on the FWP list for this lake.
Fish Species
Bigmouth BuffaloBrook TroutBrown TroutBurbotCommon CarpFathead MinnowKokaneeLongnose SuckerMottled SculpinMountain WhitefishNorthern PikeRainbow TroutSmallmouth BuffaloUtah ChubWalleyeWestslope Cutthroat TroutWhite SuckerYellow Perch
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID63168048
CountyLewis and Clark
Coordinates46.6961, -111.9319
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 63168048); Washington Dept. of Ecology bathymetry (approximate max depth). Verified October 30, 2026.