Lakes / South Dakota / Butte County / Belle Fourche Reservoir
Belle Fourche Reservoir, South Dakota
6,106.2 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
44.73 degrees N, 103.71 degrees W - Butte County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Belle Fourche Reservoir Stacks Up
- Larger than 97% of the 533 lakes counted in South Dakota.
- The largest lake in Butte County among those counted.
- About 51 miles from Rapid City, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Guidinger Reservoir | Butte | 7.3 mi | 84.29 acres |
| Newell Lake | Butte | 17 mi | 153.39 acres |
| Bear Butte Lake | Meade | 23 mi | 199.41 acres |
| Leger Dam | Harding | 40 mi | 66.97 acres |
| Pactola Reservoir | Pennington | 47 mi | 840.65 acres |
| Deerfield Lake | Pennington | 50 mi | 327.91 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Belle Fourche Reservoir
How Big Is Belle Fourche Reservoir?
Belle Fourche Reservoir covers 6,106.2 acres in Butte County, South Dakota.
What Is the Largest Lake in Butte County?
Belle Fourche Reservoir is the largest lake in Butte County, at 6,106.2 acres.
Largest Lakes in South Dakota
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Oahe | Dewey | 309,912.57 acres | - |
| 2 | Lake Francis Case | Charles Mix | 82,166.92 acres | - |
| 3 | Lake Sharpe | Hughes | 58,419.67 acres | - |
| 4 | Lewis and Clark Lake | Bon Homme | 25,141.99 acres | - |
| 5 | Lake Thompson | Kingsbury | 13,887.93 acres | - |
All 533 South Dakota lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 154900319). Verified October 30, 2026.