LakeCount. Every Lake. Measured.
Wisconsin
Wisconsin5,551 lakes & pondsMinnesota3,727 lakes & pondsMichigan3,837 lakes & pondsNew York1,783 lakes & pondsVermont425 lakes & pondsMaine1,671 lakes & pondsFlorida2,294 lakes & pondsPennsylvania743 lakes & pondsOhio352 lakes & pondsWashington1,427 lakes & pondsNorth Dakota756 lakes & pondsMontana1,695 lakes & ponds
24,261 Lakes & Ponds

Lakes / Montana / Rainbow Lake

Rainbow Lake, Deer Lodge County, Montana

20 acres
Surface Area
About 30 ft
Max Depth (Approximate)
8,224 ft
Surface Elevation

Where It Sits, and How Deep It Goes

Locator - Montana

BillingsMissoulaRainbow LakeDeer Lodge Co.

45.96 degrees N, 113.45 degrees W - Deer Lodge 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 - Rainbow Lake

0 ft - SurfaceMax Depth (Approx.) - About 30 ft

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 ID49977970
CountyDeer Lodge
Coordinates45.9575, -113.4529

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 49977970); Washington Dept. of Ecology bathymetry (approximate max depth). Verified October 30, 2026.