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Big Moon Lake
Enhanced dataInteractive depth contours
Big Moon LakeBarron 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 48-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 Big Moon Lake.
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Fishing forecast
Best windows for Big Moon 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
Big Moon Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
71°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.
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
Impairment Unknown, Excess Algal GrowthPollutants: Total Phosphorus
- Status
- 303d Listed
- 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 Big Moon Lake at Deep Hole.
Sampled Jun 2026Volunteer monitoring since 1999
Clear water — summer clarity of 12.3 ft is clearer than most monitored Wisconsin lakes.
Based on July–August volunteer averages from 2023–2025; each value shows its own year.Water claritySecchi disk depth
12.3 ftJul–Aug 2023 avg (2 readings)
ClearImproving — up ~15% vs earlier years
Clearer than 62% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
16 µg/LJul–Aug 2025 avg (2 readings)
ElevatedImproving — down ~18% vs earlier years
No recent nutrient readings — last measured 2020.
Listed as impaired on the DNR/EPA water-condition assessment — see the notice on this page for details.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 | 10.0 ft (1) | 16.0 µg/L (2) | — |
| 2024 | 7.0 ft (1) | 25.0 µg/L (1) | — |
| 2023 | 12.3 ft (2) | 3.0 µg/L (1) | — |
| 2021 | — | 14.5 µg/L (2) | — |
| 2020 | 8.6 ft (4) | 20.0 µg/L (1) | 45.0 µg/L (1) |
| 2019 | 6.0 ft (6) | 19.0 µg/L (1) | — |
| 2018 | 10.8 ft (7) | 5.5 µg/L (2) | — |
| 2017 | 7.5 ft (5) | 14.0 µg/L (2) | 30.0 µg/L (1) |
| 2016 | 5.4 ft (6) | 25.0 µg/L (2) | — |
| 2015 | 9.7 ft (5) | 12.5 µg/L (2) | — |
Latest individual samples: Secchi 10.5 ft (2025-09-14), chlorophyll-a 15 µg/L (2026-06-29), and total phosphorus 45 µg/L (2020-08-04).
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.
Big Moon Lake at Deep HoleStation 033186
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
Big Moon Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Big Moon 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 2079000 · 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 2021 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 contextA 2021-2022 comprehensive Big Moon Lake survey used spring netting and electrofishing, fall electrofishing and mark-recapture estimates to assess walleye, muskellunge, bass and panfish populations.
A 2021-2022 comprehensive Big Moon Lake survey used spring netting and electrofishing, fall electrofishing and mark-recapture estimates to assess walleye, muskellunge, bass and panfish populations.
- Historical fisheries snapshot; not current fishing regulations or navigation guidance.
- Only metrics explicitly supported by the cited source page were promoted.
- Population estimates, relative-abundance indices and size thresholds retain their source scope.
Largemouth Bass
92 fishSpring Electrofishing II catch · p. 1327.9 fish/mileSpring Electrofishing II CPUE · p. 139.4 fish/mileCPUE for fish >=14 inches · p. 13
Muskellunge
52 fishAdults marked in 2021 · p. 11101 fishAdult population estimate · p. 120.5 fish/acreAdult density · p. 121 fish/net night2021 fyke-net CPUE · p. 12
Northern Pike
47 fishSpring Netting I catch · p. 110.9 fish/net nightSpring Netting I CPUE · p. 1124.9 inchesAverage length · p. 11
Walleye
115 fishAdult population estimate · p. 80.6 fish/acreAdult density · p. 82.4 fish/net nightSpring Netting I CPUE · p. 9117 fishSpring Netting I catch · p. 9
Big Moon Lake comprehensive survey, 2021Matched by exact wbic name county · WBICs 2079000 · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this public report with source attribution.
187surface acres
48max depth feet
1public access points
45.3428, -92.1186latitude, longitude
Access
Public access points
Boat launchAccess45.34264, -92.10849Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassPanfishWalleyeMuskyNorthern Pike
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2024, when 187 fish were recorded across 1 entry.
2024
MuskellungeUpper Chippewa River · Large Fingerling
18713.3 in average
2022
MuskellungeUpper Chippewa River · Large Fingerling
17712.0 in average
2021
WalleyeMississippi Headwaters · Large Fingerling
2,0976.3 in average
2019
WalleyeMississippi Headwaters · Large Fingerling
1,9296.3 in average
2018
MuskellungeUpper Chippewa River · Large Fingerling
19411.8 in average
2017
WalleyeMississippi Headwaters · Large Fingerling
1,9654.0 in average
2016
MuskellungeUpper Chippewa River · Large Fingerling
17412.0 in average
2015
WalleyeMississippi Headwaters · Large Fingerling
1,8697.4 in average
2014
MuskellungeUpper Chippewa River · Large Fingerling
19111.1 in average
2013
WalleyeMississippi Headwaters · Large Fingerling
1,9106.3 in average
2012
MuskellungeUpper Chippewa River · Large Fingerling
19112.6 in average
2012
WalleyeMississippi Headwaters · Large Fingerling
1,4986.0 in average
Showing the 12 most recent records from 14 published entries.
Depth FAQ
How deep is Big Moon Lake?
Big Moon Lake is 48 feet deep at its deepest point and averages about 24 feet, according to Wisconsin DNR records.
Is there a free depth map of Big Moon Lake?
Yes. LakeList publishes a free interactive depth contour map of Big Moon Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from LakeList depth model survey data.
Where does the Big Moon 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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