LakeCount. Every Lake. Measured.

Lakes / Montana / Granite Lake

Granite Lake, Carbon County, Montana

14 acres
Surface Area
About 80 ft
Max Depth (Approximate)
10,200.800000000001 ft
Surface Elevation

Where It Sits, and How Deep It Goes

Locator - Montana

BillingsMissoulaGranite LakeCarbon Co.

45.16 degrees N, 109.79 degrees W - Carbon 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 - Granite Lake

0 ft - SurfaceMax Depth (Approx.) - About 80 ftA Typical Shallow Lake - Under 20 ft Deep

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 ID55321725
CountyCarbon
Coordinates45.1568, -109.7872

Largest Lakes in Montana

#LakeCountySurface AreaMax Depth
1Fort Peck LakeValley233,053 acres-
2Flathead LakeLake122,132 acresAbout 380 ft
3Canyon Ferry LakeBroadwater32,773 acresAbout 170 ft
4Lake KoocanusaLincoln28,723 acres-
5Hungry Horse ReservoirFlathead23,577 acres-
Sources: Montana Fish, Wildlife & Parks lake data (ID 55321725); Washington Dept. of Ecology bathymetry (approximate max depth). Verified October 30, 2026.