Lakes / Montana / Phillippi Reservoir
Phillippi Reservoir, Montana
79 acres
Surface Area
3,598.16 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Montana
45.33 degrees N, 104.83 degrees W - Carter 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 Phillippi Reservoir Stacks Up
- About 180 miles from Billings, as the crow flies.
- 2 fish species on the FWP list for this lake.
Fish Species
Channel CatfishLargemouth Bass
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID136483261
CountyCarter
Coordinates45.3279, -104.8279
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 136483261). Verified October 30, 2026.