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Lower Eau Claire Lake
Enhanced dataInteractive depth contours
Lower Eau Claire LakeDouglas County, WI
Contours load with map
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 95% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 41-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 Lower Eau Claire Lake.
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Fishing forecast
Best windows for Lower Eau Claire 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
Lower Eau Claire 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.
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Lower Eau Claire Lake - Deep Hole.
Sampled May 2026Volunteer monitoring since 1993
Clear, low-algae water — summer clarity of 11.1 ft is clearer than most monitored Wisconsin lakes.
Based on July–August volunteer averages from 2024–2025; each value shows its own year.44Mesotrophic5-yr summer TSI
Moderately clear with moderate nutrients — a typical profile for good swimming lakes.
Water claritySecchi disk depth
11.1 ftJul–Aug 2024 avg (8 readings)
ClearDeclining — down ~19% vs earlier years
Clearer than 64% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
3.7 µg/LJul–Aug 2025 avg (3 readings)
LowWorsening — up ~25% vs earlier years
NutrientsTotal phosphorus — fuels plant & algae growth
13 µg/LLatest single sample · 2021-06-21
LowLow 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 |
|---|---|---|---|
| 2025 | — | 3.7 µg/L (3) | — |
| 2024 | 11.1 ft (8) | 10.0 µg/L (2) | — |
| 2023 | 14.9 ft (7) | 3.7 µg/L (3) | — |
| 2022 | 12.3 ft (8) | 5.7 µg/L (3) | — |
| 2021 | 15.5 ft (6) | 3.7 µg/L (3) | — |
| 2020 | 16.0 ft (7) | 4.5 µg/L (2) | — |
| 2019 | 16.1 ft (8) | 4.0 µg/L (3) | — |
| 2018 | 16.1 ft (8) | 3.0 µg/L (3) | — |
| 2017 | 16.8 ft (5) | 3.3 µg/L (3) | — |
| 2016 | 14.6 ft (5) | 2.5 µg/L (2) | — |
Latest individual samples: Secchi 11 ft (2026-05-06), chlorophyll-a 8 µg/L (2025-08-26), and total phosphorus 13 µg/L (2021-06-21).
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.
Lower Eau Claire Lake - Deep HoleStation 043037 · 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 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
Lower Eau Claire Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Lower Eau Claire 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 2741600 · 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 2025 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 contextLower Eau Claire Lake late-spring electrofishing results. Panfish and nongame metrics apply to 1.5 all-species miles; gamefish metrics use six total miles. The LakeList target is the exact Douglas County queue row while the report's cross-county source scope is preserved.
Wisconsin DNR's 2025 survey found slightly above-average bluegill catch, a quality largemouth-bass fishery, average northern-pike catch, lower-abundance but larger walleye, and abundant small yellow perch supporting predators.
- The public report explicitly spans Douglas and Bayfield counties; that source geography is retained even though the exact LakeList queue target has county Douglas.
- Forty-nine yellow perch were all shorter than six inches; LakeList stores the printed upper bound without inventing an exact maximum.
- Species reported only as five or fewer fish were excluded because exact counts were not printed.
Bluegill
172 fishTotal captured · p. 12.1 inchesMinimum captured length · p. 19.1 inchesMaximum captured length · p. 1115 fish/mileSurvey CPUE · p. 1
Largemouth bass
63 fishTotal captured · p. 26.7 inchesMinimum captured length · p. 220.8 inchesMaximum captured length · p. 211 fish/mileSurvey CPUE · p. 2
Northern pike
11 fishTotal captured · p. 214 inchesMinimum captured length · p. 228.4 inchesMaximum captured length · p. 21.8 fish/mileSurvey CPUE · p. 2
Rock bass
7 fishTotal captured · p. 3
Walleye
18 fishTotal captured · p. 37.4 inchesMinimum captured length · p. 325 inchesMaximum captured length · p. 33 fish/mileSurvey CPUE · p. 3
White sucker
11 fishTotal captured · p. 3
Yellow perch
49 fishTotal captured · p. 36 inchesAll captured fish shorter than · p. 3
2025 Fisheries Information Sheet: Lower Eau Claire Lake, Douglas and Bayfield CountiesMatched by exact wbic and name county · WBICs 2741600 · verified 2026-07-18Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this report with source attribution.
784surface acres
41max depth feet
0public access points
46.2732, -91.5511latitude, longitude
Access
Public access points
No mapped access points yet
LakeList has not matched a public launch, park, or shoreline access point for this lake yet.
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassNorthern PikePanfishMuskySmallmouth BassWalleye
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2025, when 7,841 fish were recorded across 1 entry.
2025
WalleyeChippewa/St. Croix · Large Fingerling
7,8417.0 in average
2024
MuskellungeUpper Chippewa River · Large Fingerling
39213.3 in average
2023
WalleyeChippewa/St. Croix · Large Fingerling
7,8416.5 in average
2021
WalleyeMississippi Headwaters · Large Fingerling
8,6246.7 in average
2019
WalleyeMississippi Headwaters · Large Fingerling
7,8446.3 in average
2018
MuskellungeUpper Chippewa River · Large Fingerling
43011.8 in average
2017
WalleyeMississippi Headwaters · Large Fingerling
7,4636.5 in average
2016
MuskellungeUpper Chippewa River · Large Fingerling
24011.8 in average
2015
WalleyeMississippi Headwaters · Large Fingerling
7,8447.4 in average
2014
MuskellungeUpper Chippewa River · Large Fingerling
40111.4 in average
2012
MuskellungeUpper Chippewa River · Large Fingerling
40113.3 in average
2010
MuskellungeUpper Chippewa River · Large Fingerling
17612.7 in average
Depth FAQ
How deep is Lower Eau Claire Lake?
Lower Eau Claire Lake is 41 feet deep at its deepest point and averages about 22 feet, according to Wisconsin DNR records.
Is there a free depth map of Lower Eau Claire Lake?
Yes. LakeList publishes a free interactive depth contour map of Lower Eau Claire Lake 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 Lower Eau Claire Lake 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 Pagesname, coordinates, county, source identifiers
LakeList record updated 2026-05-25
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