Lakes / Montana / Upper Glaston Lake
Upper Glaston Lake, Montana
334 acres
Surface Area
4,647.76 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Montana
46.04 degrees N, 109.82 degrees W - Sweet Grass 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 Upper Glaston Lake Stacks Up
- About 64 miles from Bozeman, as the crow flies.
- 3 fish species on the FWP list for this lake.
Fish Species
Brown TroutWhite SuckerYellow Perch
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID60392709
CountySweet Grass
Coordinates46.0366, -109.8198
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 60392709). Verified October 30, 2026.