Lakes / Montana / Willow Creek Reservoir
Willow Creek Reservoir, Lewis and Clark County, Montana
1,314 acres
Surface Area
About 50 ft
Max Depth (Approximate)
4,198.4 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Montana
47.56 degrees N, 112.45 degrees W - Lewis and Clark 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 - Willow Creek Reservoir
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map. Max depth is approximate, from state bathymetry.
How Willow Creek Reservoir Stacks Up
- About 56 miles from Great Falls, as the crow flies.
- 4 fish species on the FWP list for this lake.
Fish Species
Brook TroutLake ChubRainbow TroutWhite Sucker
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID123043113
CountyLewis and Clark
Coordinates47.5576, -112.4482
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 123043113); Washington Dept. of Ecology bathymetry (approximate max depth). Verified October 30, 2026.