Lakes / South Dakota / Roberts County / Oneroad Lake
Oneroad Lake, South Dakota
115.65 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.51 degrees N, 97.15 degrees W - Roberts 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 Oneroad Lake Stacks Up
- Larger than 47% of the 533 lakes counted in South Dakota.
- About 42 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Tahana Lake | Roberts | 2.5 mi | 47.44 acres |
| Drywood Lakes | Roberts | 4.4 mi | 1,026.97 acres |
| Owl Lake | Roberts | 5.5 mi | 143.57 acres |
| Pickerel Lake | Day | 5.9 mi | 995.09 acres |
| Lake Whipple | Roberts | 6.8 mi | 85.75 acres |
| Enemy Swim Lake | Day | 7.2 mi | 2,170.08 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Oneroad Lake
How Big Is Oneroad Lake?
Oneroad Lake covers 115.65 acres in Roberts County, South Dakota.
What Is the Largest Lake in Roberts County?
Lake Traverse is the largest lake in Roberts County, at 10,747.48 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 145088813). Verified October 30, 2026.