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Lake Redstone
Enhanced dataInteractive depth contours
Lake RedstoneSauk County, WI
Contours load with map Access
Interactive depth contours5-foot typical interval · Sonar-derived depth (C-MAP Genesis) · Gaps interpolated · Not for navigation
Source: C-MAP Genesis community sonar (derived)high confidence · QA passed · Select a contour to inspect its mapped depthDepths decoded from C-MAP Genesis Social Map community sonar recordings (used with permission), covering 48% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 36-ft maximum depth. More accurate than a pure model, but still an estimate. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Lake Redstone.
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Fishing forecast
Best windows for Lake Redstone
Weather-based planning built from the National Weather Service hourly forecast near this lake.
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Checking wind, precipitation, and near-term weather windows.
Water temperature
Lake Redstone water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
76°FPeak summer
Seasonal estimate. Checking current National Weather Service air temperatures…
Warmest water of the year. Fish hold deeper or feed in low light; swimming and watersports are at their best.
Estimates are modeled, not measured. Actual temperatures vary with depth, wind mixing, and recent weather — verify conditions before swimming, boating, or heading onto ice.
Wisconsin DNR water assessment
Impaired waterbody listed
The DNR lists this waterbody as impaired. This notice is not itself a closure; review the official assessment and current guidance before your trip.
303(d) / impairment recordRecreation restrictions noted
Excess Algal GrowthPollutants: Total Phosphorus, Unknown Pollutant
- Status
- TMDL Approved, Pollutant Removed
- Public health
- General Advice
- Recreation
- Recreational Restrictions
- Aquatic life
- Not specified
Water is impaired due to one or more pollutants and associated quality impacts.
Review DNR water quality Check consumption advice Source updated 2026-03-25 · LakeList verified 2026-07-12
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Lake Redstone - Deep Hole.
Sampled May 2026Volunteer monitoring since 1986
Murky, algae-prone water — summer clarity of 1.9 ft ranks among the lowest of monitored Wisconsin lakes.
Based on July–August volunteer averages from 2024–2025; each value shows its own year.72Hypereutrophic5-yr summer TSI
Very nutrient-rich water — heavy algae and plant growth pressure.
Water claritySecchi disk depth
1.9 ftJul–Aug 2024 avg (2 readings)
MurkyDeclining — down ~19% vs earlier years
Clearer than 2% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
106.5 µg/LJul–Aug 2025 avg (2 readings)
HighWorsening — up ~55% vs earlier years
NutrientsTotal phosphorus — fuels plant & algae growth
49 µg/LLatest single sample · 2024-06-18
Elevated2018–2021
Elevated phosphorus supports strong plant/algae growth pressure.
All readings by year · station details · methodology
Summer averages (July/August)
July/August means; counts in parentheses show how many samples went into each average.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2025 | — | 106.5 µg/L (2) | — |
| 2024 | 1.9 ft (2) | 97.0 µg/L (3) | — |
| 2023 | 2.5 ft (2) | 64.5 µg/L (2) | — |
| 2022 | 2.0 ft (1) | 48.0 µg/L (1) | — |
| 2021 | — | 68.0 µg/L (2) | 59.0 µg/L (1) |
| 2020 | — | 56.5 µg/L (2) | — |
| 2019 | 3.4 ft (5) | 36.0 µg/L (5) | 54.0 µg/L (1) |
| 2018 | 2.2 ft (3) | 48.3 µg/L (4) | 60.0 µg/L (1) |
| 2017 | 2.3 ft (2) | 35.3 µg/L (3) | — |
| 2016 | 3.0 ft (1) | 36.0 µg/L (1) | — |
Latest individual samples: Secchi 2 ft (2024-09-23), chlorophyll-a 39 µg/L (2026-05-14), and total phosphorus 49 µg/L (2024-06-18).
Secchi clarity is how deep a black-and-white disk stays visible from the surface — more feet means clearer water.
Chlorophyll-a is an algae pigment; higher values signal more algae in the water column.
Total phosphorus is a nutrient that feeds algae and aquatic plants. It is not a weed survey — depth, bottom type, water movement, and management change the actual lake experience.
Lake Redstone - Deep HoleStation 573124 · TSI based on chlorophyll
Modeled from DNR/CLMN monitoring — not a safety or swim-condition report. Verify current conditions locally. LakeList verified 2026-07-12.Official Wisconsin information
Plan with DNR sources
LakeList links to the authoritative record so you can verify maps, rules, and current notices before leaving.
Historical DNR depth maps4 converted map sheetsView DNR depth mapHistorical map · not for navigationFishing regulationsVerify current seasons, limits, and restrictionsOfficial DNR lake pageFacts, advisories, boating, and water qualityWater quality reportsMonitoring stations, clarity, and DNR reportsInvasive speciesVerified, observed, and historical AIS recordsBoating ordinancesLocal slow-no-wake and water-use restrictionsFish consumption advisoriesStatewide and waterbody-specific health guidance
Historical depth maps are not for navigation. Verify regulations and access at the official source before your trip.
Historical Wisconsin DNR maps
Lake Redstone depth maps
4 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Lake Redstone · sheet 1
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 1280400 · image navigation only; spatial alignment pending · Historical lake maps are not for navigation.
Source: Wisconsin Department of Natural Resources. Converted for browser access with source URLs, checksums, and retrieval dates retained. Historical lake maps are not for navigation.
Wisconsin DNR fisheries survey
Fish population survey
Structured LakeList extraction from the 2022 DNR fisheries survey. Population estimates, density, and catch-rate indices use different units, methods, and scopes, so each value is presented in its original form rather than normalized against a different measure.
Survey indicatorsValues keep their source unit and method; unlike measures are not scaled or compared.
Management contextComprehensive 2022-2023 assessment of Lake Redstone panfish, walleye, bass, and muskellunge populations using spring netting and electrofishing, fall electrofishing, and mark-recapture estimates.
Comprehensive 2022-2023 assessment of Lake Redstone panfish, walleye, bass, and muskellunge populations using spring netting and electrofishing, fall electrofishing, and mark-recapture estimates.
- Historical fisheries snapshot; not current fishing regulations or navigation guidance.
- Only metrics explicitly supported by the cited source page were promoted.
- Species captured as protocol by-catch are labeled as such in method and interpretation.
Black Crappie
18.2 fish/net nightSpring Netting II CPUE · p. 15
Bluegill
61 fish/mileSpring electrofishing II CPUE · p. 13
Largemouth Bass
28.6 fish/mileSpring electrofishing II CPUE · p. 18
Muskellunge
274 fishAdult muskellunge population estimate (>=30 inches) · p. 210.5 fish/acreAdult muskellunge density (>=30 inches) · p. 211 fish/net nightSpring Netting I CPUE · p. 20
Smallmouth Bass
4.6 fish/mileSpring electrofishing II CPUE · p. 19
Walleye
456 fishAdult walleye population estimate (>=15 inches) · p. 170.8 fish/acreAdult walleye density (>=15 inches) · p. 17581 fishTotal adult walleye population estimate · p. 171 fish/acreTotal adult walleye density · p. 17
White Crappie
33.6 fish/net nightSpring Netting II CPUE · p. 14
Yellow Perch
1.3 fish/net nightSpring Netting I CPUE · p. 16
Lake Redstone comprehensive survey, 2022 [PDF]Matched by exact wbic name county · WBICs 1280400 · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this public report with source attribution.
635surface acres
36max depth feet
3public access points
43.6067, -90.0925latitude, longitude
Access
Public access points
Boat launchFox Court Boat Landing43.58963, -90.08404Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchLake Redstone Access43.62002, -90.09089Managed by TOWNSHIPTOWN OF LA VALLERamp surface: Concrete PanelsADA-accessible feature: NoVerified 2026-07-12
Boat launchSauk County Boat Landing43.62413, -90.07864Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassPanfishMuskyNorthern PikeWalleye
Depth FAQ
How deep is Lake Redstone?
Lake Redstone is 36 feet deep at its deepest point and averages about 14 feet, according to Wisconsin DNR records.
Is there a free depth map of Lake Redstone?
Yes. LakeList publishes a free interactive depth contour map of Lake Redstone at a typical 5-foot interval, with an optional 3D underwater view, derived from C-MAP Genesis community sonar (derived) survey data.
Where does the Lake Redstone depth map come from?
The interactive depth contours are derived from C-MAP Genesis community sonar (derived). Each contour set passes a visual QA review against the source document before it is published. The depths are derived from community sonar recordings (C-MAP Genesis Social Map, used with permission), with gaps between recordings interpolated; not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Mapsname, coordinates, county, source identifiers
LakeList record updated 2026-07-14