Lakes / South Dakota / Brown County / Columbia Road Reservoir
Columbia Road Reservoir, South Dakota
7,074.89 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.72 degrees N, 98.28 degrees W - Brown 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 Columbia Road Reservoir Stacks Up
- Ranks #9 for surface area among the South Dakota lakes counted so far - 7,074.89 acres.
- The largest lake in Brown County among those counted.
- About 21 miles from Aberdeen, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Willow Creek Lake | Brown | 16 mi | 255.51 acres |
| Alkali Lake | Brown | 16 mi | 85.75 acres |
| Richmond Lake | Brown | 20 mi | 810.01 acres |
| Elm Lake | Brown | 23 mi | 1,225.4 acres |
| Hickman Lake | Marshall | 26 mi | 30.15 acres |
| Lords Lake | Brown | 28 mi | 89.45 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Columbia Road Reservoir
How Big Is Columbia Road Reservoir?
Columbia Road Reservoir covers 7,074.89 acres in Brown County, South Dakota.
What Is the Largest Lake in Brown County?
Columbia Road Reservoir is the largest lake in Brown County, at 7,074.89 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 {FE8C2414-868D-42C5-A7DE-1980B7357E2A}). Verified October 30, 2026.