Lake Mason, Montana
1,220 acres
Surface Area
3,526 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Montana
46.53 degrees N, 108.67 degrees W - Musselshell 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 Lake Mason Stacks Up
- The largest lake in Musselshell County among those counted.
- About 52 miles from Billings, as the crow flies.
- 2 fish species on the FWP list for this lake.
Fish Species
BluegillLargemouth Bass
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID130684820
CountyMusselshell
Coordinates46.5261, -108.6660
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 130684820). Verified October 30, 2026.