Sauk County Lake Quality
Wisconsin, 11 lakes, average grade B (Good)
Sauk County has 11 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. With an average grade of B, Sauk County sits comfortably above the Wisconsin median.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Dutch Hollow Lake (A); the most-stressed is Lake Redstone (C).
Quick Answers for Sauk County
Planning a trip? Check special fishing regulations for Dutch Hollow Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
DNR Reports (2)
Wisconsin DNR Fisheries Survey resources for lakes in Sauk County. browse all reports →
- 2024Devils Lake creel survey, 2024Creel Survey · WI DNR · 2024 (PDF)
- 2024Devils Lake comprehensive fishery survey, 2024Comprehensive Survey · WI DNR · 2024 (PDF)
All Lakes in Sauk County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Dutch Hollow Lake | A | 49.2 ft | 38 ft | 13.1 µg/L |
| 2 | Devils Lake | A | 34.9 ft | 47 ft | - |
| 3 | Buckhorn Lake | A | - | - | 12 µg/L |
| 4 | White Mound Lake | A | 16.4 ft | 16 ft | 28.4 µg/L |
| 5 | Long Lake | B | 13.5 ft | - | 27.9 µg/L |
| 6 | Mirror Lake | B | 15.6 ft | - | 65.4 µg/L |
| 7 | Bakkens Pond | B | 8.2 ft | - | 23.3 µg/L |
| 8 | Hill Slough Lake | B | 14.4 ft | - | 42.7 µg/L |
| 9 | Lake Delton | C | 8.2 ft | 16 ft | - |
| 10 | Lake Wisconsin Palisade Street Bay | C | 8.6 ft | 24 ft | - |
| 11 | Lake Redstone | C | 7.3 ft | - | 89 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.