Lakes / South Dakota / Clark County / Pepper Slough
Pepper Slough, South Dakota
111.44 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.05 degrees N, 97.59 degrees W - Clark 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 Pepper Slough Stacks Up
- Larger than 47% of the 533 lakes counted in South Dakota.
- About 26 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Todd | Clark | 2.0 mi | 203.13 acres |
| Carson Lake | Clark | 3.1 mi | 142.14 acres |
| Madian Lake | Clark | 3.8 mi | 62.27 acres |
| Heggs Lake | Clark | 5.9 mi | 392.43 acres |
| Warner Lake | Codington | 6.0 mi | 149.75 acres |
| Swan Lake | Clark | 6.2 mi | 936.31 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Pepper Slough
How Big Is Pepper Slough?
Pepper Slough covers 111.44 acres in Clark County, South Dakota.
What Is the Largest Lake in Clark County?
Dry Lake Number Two is the largest lake in Clark County, at 6,441.66 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 145096616). Verified October 30, 2026.