Lakes / Montana / Boatman Lake
Boatman Lake, Montana
7 acres
Surface Area
About 2 ft
Max Depth (Approximate)
8,190.16 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Montana
45.39 degrees N, 112.98 degrees W - Beaverhead 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 - Boatman Lake
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map. Max depth is approximate, from state bathymetry.
Facts and Figures
Waterbody ID{EA236155-3D56-4224-A150-C87F04EA8BE9}
CountyBeaverhead
Coordinates45.3886, -112.9766
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 {EA236155-3D56-4224-A150-C87F04EA8BE9}); Washington Dept. of Ecology bathymetry (approximate max depth). Verified October 30, 2026.