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Black Dan Lake
Enhanced dataInteractive depth contours
Black Dan LakeSawyer County, WI
Contours load with map Access
Interactive depth contours5-foot typical interval · Modeled depth estimate · Not a survey · Not for navigation
Source: LakeList depth modelmedium confidence · QA passed · Select a contour to inspect its mapped depthModeled depth estimate: contours computed from the lake's shoreline shape and its documented 37-ft maximum depth (depth grows with distance from shore, calibrated to the documented mean depth where available). This is a smooth mathematical model, not a survey - real holes, bars, and drop-offs will differ. Community sonar (C-MAP Genesis) overlays where recorded. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Black Dan Lake.
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Fishing forecast
Best windows for Black Dan Lake
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
Black Dan Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
74°FWarm
Seasonal estimate. Checking current National Weather Service air temperatures…
Comfortable summer pattern. Bass and panfish are active; early and late hours beat the midday heat.
Estimates are modeled, not measured. Actual temperatures vary with depth, wind mixing, and recent weather — verify conditions before swimming, boating, or heading onto ice.
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Black Dan Lake - Deep Hole.
Last sampled Jul 2023
Through 2023, clear, low-algae water — summer clarity of 13 ft is clearer than most monitored Wisconsin lakes.
Based on July–August 2021 averages across 6 volunteer readings.Water claritySecchi disk depth
13 ftJul–Aug 2021 avg (2 readings)
ClearStable since 2015
Clearer than 69% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
1 µg/LJul–Aug 2021 avg (2 readings)
Very lowImproving — down ~15% vs earlier years
NutrientsTotal phosphorus — fuels plant & algae growth
14.5 µg/LJul–Aug 2021 avg (2 readings)
Low2015–2021
Low phosphorus means light 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 |
|---|---|---|---|
| 2023 | 12.0 ft (1) | — | — |
| 2022 | 12.5 ft (1) | 3.0 µg/L (1) | — |
| 2021 | 13.0 ft (2) | 1.0 µg/L (2) | 14.5 µg/L (2) |
| 2020 | 12.0 ft (2) | 1.5 µg/L (2) | 13.0 µg/L (1) |
| 2018 | 11.5 ft (2) | 2.5 µg/L (2) | 13.0 µg/L (1) |
| 2017 | 13.0 ft (2) | 1.0 µg/L (1) | — |
| 2016 | 9.5 ft (1) | 3.0 µg/L (1) | — |
| 2015 | 11.7 ft (3) | 3.0 µg/L (3) | 17.0 µg/L (1) |
| 2014 | 10.8 ft (3) | 6.0 µg/L (2) | — |
| 2013 | 12.1 ft (4) | 4.5 µg/L (2) | — |
Latest individual samples: Secchi 12 ft (2023-07-30), chlorophyll-a 3 µg/L (2022-09-05), and total phosphorus 11 µg/L (2021-07-25).
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.
Black Dan Lake - Deep HoleStation 583162
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 maps1 converted map sheetFishing 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
Black Dan Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Black Dan Lake · 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 2381900 · 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.
121surface acres
37max depth feet
1public access points
45.8972, -90.9354latitude, longitude
Access
Public access points
Boat launchBlack Dan Lake Access45.89320, -90.93439Managed by TOWNSHIPTOWN OF WINTERRamp surface: GravelADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
WalleyeLargemouth BassMuskyNorthern PikePanfish
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2024, when 1,209 fish were recorded across 1 entry.
2024
WalleyeChippewa/St. Croix · Large Fingerling
1,2097.1 in average
2022
WalleyeMississippi Headwaters · Large Fingerling
1,3036.7 in average
2020
WalleyeMississippi Headwaters · Large Fingerling
1,8136.8 in average
2018
WalleyeMississippi Headwaters · Large Fingerling
1,8996.3 in average
2016
WalleyeMississippi Headwaters · Large Fingerling
1,8117.7 in average
2014
WalleyeMississippi Headwaters · Large Fingerling
1,8136.4 in average
2012
WalleyeMississippi Headwaters · Large Fingerling
6407.5 in average
2012
WalleyeUnspecified · Large Fingerling
6407.5 in average
2011
WalleyeUnspecified · Large Fingerling
8258.0 in average
2010
Brown TroutSt. Croix · Adult (Broodstock)
12820.0 in average
2010
WalleyeMississippi Mainstem · Large Fingerling
6007.2 in average
Depth FAQ
How deep is Black Dan Lake?
Black Dan Lake is 37 feet deep at its deepest point and averages about 13 feet, according to Wisconsin DNR records.
Is there a free depth map of Black Dan Lake?
Yes. LakeList publishes a free interactive depth contour map of Black Dan Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from LakeList depth model survey data.
Where does the Black Dan Lake depth map come from?
The interactive depth contours are derived from LakeList depth model. Each contour set passes a visual QA review against the source document before it is published. The depths are a modeled estimate calibrated to the lake's documented maximum depth - not a survey, and not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Pagesname, coordinates, county, source identifiers
LakeList record updated 2026-07-12
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