Redstone Lake
Sauk County, Wisconsin · WBIC 1280400
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
612 acres
Max depth
36 ft
DNR lake type
Complex, Warm, dark water color
Water clarity
2.4 ft
Low, measured May 2026
A warm-water lake type: the DNR groups it with lakes that warm up through summer. This describes the lake type in general, not this lake in particular.
Outline
Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1975), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
2.4 ft Secchi depthLow
Last measured May 5, 2026. 332 readings on record, 1986 to 2026.
Typical summer clarity (June to September): 2.5 ft, low, from 51 readings (2012 to 2024).
Measured at the monitoring station named “LAKE REDSTONE - DEEP HOLE”.
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. Clear means a Secchi depth of 10 feet or more, moderate 5 to 10 feet, low under 5 feet.
Wisconsin DNR water monitoring (volunteer and staff), via the Water Quality Portal; station LAKE REDSTONE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
Last measured May 5, 2026, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 2 (Mar 27 to Apr 9)
- Surface reaches 48°Fabout Apr 20 (Apr 12 to Apr 27)
- Surface reaches 64°Fabout May 8 (May 6 to May 14)
- June surface77°F, usually 76 to 79°F
- July surface83°F, usually 81 to 84°F
- August surface79°F, usually 76 to 80°F
Forms a warm top layer around May 4, lasting about 162 days.
A computer model of this lake's typical weather and water, built from 15 years, 2005 to 2019. Ranges show the middle half of years. The model was calibrated against measured temperatures for this lake. It is an estimate, not a measurement.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). Modeled: U.S. Geological Survey lake temperature data release (doi:10.5066/P9CA6XP8).
Today at the lake
Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.
Stocking history
- Muskellungelast stocked 2025 (large fingerling); stocked in 11 years since 2010
- Walleyelast stocked 2025 (large fingerling, small fingerling and yearling); stocked in 13 years since 2010
Stocking shows what was added to the lake, not what is in it now.
Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.
Boat landings
- 1Redstone Fox Court Boat LandingBoat ramp · Concrete Panels surface · Township
Directions - 2Redstone Boat LandingBoat ramp · Concrete surface · Accessible features · County
Directions - 3Lake Redstone AccessBoat ramp · Concrete Panels surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
Water level and flow
- BIG CREEK OUTLET AT LAKE REDSTONE NR LA VALLE, WIGage height, Discharge
- E BRANCH BIG CREEK AT LAVALLE RD NR LA VALLE, WIGage height, Discharge
U.S. Geological Survey gauges at or beside this lake. Readings are provisional and fetched when you open the page.
More lakes in Sauk County
- Hemlock Slough3.1 miles away
- Dutch Hollow Lake5.0 miles away
- Virginia Lake9.7 miles away
- Mirror Lake14 miles away
- Blass Lake14 miles away
- Delton Lake15 miles away
Where this comes from
- Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
- OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
- Stocking historyWisconsin DNR annual fish stocking summary, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Boat landingsWisconsin DNR public boat access sites, checked Oct 23, 2026
- Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Typical-year temperatureU.S. Geological Survey lake temperature model (modeled estimate), checked Oct 23, 2026
- Water level and flowU.S. Geological Survey gauges (readings are live), checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Depth map linkWisconsin DNR lake maps list, checked Oct 24, 2026
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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