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Altoona Lake
Enhanced dataInteractive depth contours
Altoona LakeEau Claire 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 83% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 25-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 Altoona Lake.
Start here
Fishing forecast
Best windows for Altoona 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
Altoona Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
75°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
Impairment Unknown, Excess Algal GrowthPollutants: Total Phosphorus, Unknown Pollutant
- Status
- 303d Listed, 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 Altoona Lake - Center of Lake.
Sampled Sep 2025Volunteer monitoring since 2011
Somewhat hazy water — summer clarity of 3.4 ft is lower than most monitored Wisconsin lakes.
Based on July–August volunteer averages from 2024–2025; each value shows its own year.60Eutrophic5-yr summer TSI
Nutrient-rich, greener water — more algae and plant growth, common in shallower lakes.
Water claritySecchi disk depth
3.4 ftJul–Aug 2025 avg (4 readings)
HazyStable since 2018
Clearer than 23% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
19 µg/LJul–Aug 2025 avg (2 readings)
ElevatedStable since 2015
NutrientsTotal phosphorus — fuels plant & algae growth
118 µg/LJul–Aug 2024 avg (2 readings)
HighStable since 2018
High phosphorus points to heavy 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 | 3.4 ft (4) | 19.0 µg/L (2) | 124.0 µg/L (1) |
| 2024 | 3.2 ft (9) | 15.0 µg/L (2) | 118.0 µg/L (2) |
| 2023 | 2.8 ft (7) | 86.5 µg/L (2) | 170.0 µg/L (1) |
| 2022 | 2.9 ft (5) | 1.5 µg/L (2) | 107.0 µg/L (1) |
| 2021 | 3.5 ft (5) | — | — |
| 2020 | 4.2 ft (8) | — | — |
| 2019 | 3.3 ft (6) | — | — |
| 2018 | 2.1 ft (6) | 79.0 µg/L (2) | 141.5 µg/L (2) |
| 2016 | — | 33.0 µg/L (1) | — |
| 2015 | — | 43.5 µg/L (2) | — |
Latest individual samples: Secchi 5 ft (2025-09-26), chlorophyll-a 24 µg/L (2025-08-31), and total phosphorus 124 µg/L (2025-07-21).
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.
Altoona Lake - Center of LakeStation 183082 · TSI based on Secchi
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 sheetView 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
Altoona Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Altoona 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 2128100 · 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.
720surface acres
25max depth feet
2public access points
44.8154, -91.4248latitude, longitude
Access
Public access points
Boat launchAccess Off Indian Hills Dr44.81821, -91.43751Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchAccess Off Kewin St44.81072, -91.42638Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
LodgingThe Retreat Center1.5 miles away
LodgingStaybridge Suites Eau Claire - Altoona1.6 miles away
LodgingFairfield Inn & Suites Eau Claire Chippewa Falls1.7 miles away
LodgingGarton's Motel2.2 miles away
LodgingLodging2.2 miles away
LodgingMaple Manor Motel2.2 miles away
LodgingLodging2.2 miles away
LodgingAntlers Motel2.2 miles away
LodgingRodeway Inn & Suites Eau Claire2.4 miles away
LodgingCountry Inn & Suites By Carlson, Eau Claire2.5 miles away
LodgingGrandStay Residential Suites Hotel Eau Claire2.5 miles away
LodgingBaymont Inn & Suites Eau Claire WI2.8 miles away
LodgingHome2 Suites3.0 miles away
LodgingCandlewood Suites Eau Claire I-943.3 miles away
LodgingHoliday Inn Eau Claire South I-943.3 miles away
LodgingLodging3.4 miles away
LodgingEcono Lodge3.7 miles away
LodgingThe Oxbow Hotel3.7 miles away
LodgingThe Lismore Hotel Eau Claire - a DoubleTree by Hilton Hotel3.7 miles away
LodgingMetropolis Resort4.0 miles away
Fishery
Notable species
Smallmouth BassWalleyeMuskyPanfish
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2022, when 838 fish were recorded across 1 entry.
2022
MuskellungeUpper Chippewa River · Large Fingerling
83811.6 in average
2021
MuskellungeUpper Chippewa River · Large Fingerling
39213.9 in average
2017
WalleyeUnspecified · Adult
116.0 in average
2015
MuskellungeUpper Chippewa River · Large Fingerling
83812.1 in average
2015
WalleyeUnspecified · Adult
215.0 in average
2013
MuskellungeUpper Chippewa River · Large Fingerling
43811.3 in average
2011
MuskellungeUpper Chippewa River · Large Fingerling
7969.7 in average
Depth FAQ
How deep is Altoona Lake?
Altoona Lake is 25 feet deep at its deepest point and averages about 10 feet, according to Wisconsin DNR records.
Is there a free depth map of Altoona Lake?
Yes. LakeList publishes a free interactive depth contour map of Altoona 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 Altoona 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 Mapsname, coordinates, county, source identifiers
LakeList record updated 2026-07-19
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