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Largon Lake
Enhanced dataInteractive depth contours
Largon LakePolk 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 92% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 10-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 Largon Lake.
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Fishing forecast
Best windows for Largon 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
Largon Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
77°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.
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Largon Lake - Deep Hole.
Last sampled Oct 2022
Through 2022, murky, algae-prone water — summer clarity of 2.4 ft ranks among the lowest of monitored Wisconsin lakes.
Based on July–August 2022 averages across 7 volunteer readings.Water claritySecchi disk depth
2.4 ftJul–Aug 2022 avg (5 readings)
MurkyStable since 2010
Clearer than 12% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
39 µg/LJul–Aug 2022 avg (2 readings)
High2016–2022
No recent nutrient readings — last measured 2016.
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 |
|---|---|---|---|
| 2022 | 2.4 ft (5) | 39.0 µg/L (2) | — |
| 2021 | 2.4 ft (11) | 58.0 µg/L (2) | — |
| 2016 | 1.8 ft (3) | 149.0 µg/L (2) | 101.0 µg/L (1) |
| 2014 | 2.9 ft (4) | — | — |
| 2013 | 2.0 ft (4) | — | — |
| 2012 | 2.0 ft (1) | — | — |
| 2011 | 3.3 ft (3) | — | — |
| 2010 | 2.6 ft (4) | — | — |
| 2009 | 1.8 ft (2) | — | — |
| 2008 | 2.9 ft (5) | — | — |
Latest individual samples: Secchi 3.5 ft (2022-10-20), chlorophyll-a 48 µg/L (2022-09-12), and total phosphorus 101 µg/L (2016-07-26).
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.
Largon Lake - Deep HoleStation 493142
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
Largon Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Largon 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 2668100 · 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 contextThe 2021 early-spring mark-recapture survey used 21 fyke-net nights to estimate adult Northern Pike density, relative abundance, size structure and growth in Largon Lake (WBIC 2668100).
The 2021 early-spring mark-recapture survey used 21 fyke-net nights to estimate adult Northern Pike density, relative abundance, size structure and growth in Largon Lake (WBIC 2668100).
- Historical fisheries snapshot; not current fishing regulations or navigation guidance.
- Only metrics explicitly supported by the cited source page were promoted.
- Relative-abundance indices, estimates, confidence bounds, gear limitations and size thresholds retain source scope.
Northern Pike
721 fishSpring fyke-net catch · p. 310.9 fish/acreAdult population density estimate · p. 30.1 ratioPopulation estimate coefficient of variation · p. 334.3 fish/net nightSpring fyke-net CPUE · p. 3
Northern Pike - Female
18 inchesMinimum observed female length · p. 438.5 inchesMaximum observed female length · p. 4
Northern Pike - Male
15 inchesMinimum observed male length · p. 428.5 inchesMaximum observed male length · p. 4
Largon Lake northern pike survey, 2021 [PDF]Matched by exact wbic name county · WBICs 2668100 · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this public report with source attribution.
135surface acres
10max depth feet
1public access points
45.6141, -92.1974latitude, longitude
Access
Public access points
Boat launchAccess45.61136, -92.19221Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassNorthern PikePanfish
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2016, when 18,350 fish were recorded across 2 entries.
2016
BluegillUnspecified · Large Fingerling
11,6080.5 in average
2016
Largemouth BassUnspecified · Large Fingerling
6,7422.2 in average
2015
BluegillUnspecified · Large Fingerling
13,4790.8 in average
2015
BluegillUnspecified · Yearling
4004.0 in average
2015
Largemouth BassUnspecified · Large Fingerling
5,0451.9 in average
2014
BluegillUnspecified · Large Fingerling
13,4951.0 in average
2014
BluegillUnspecified · Yearling
2,0003.0 in average
2014
Largemouth BassUnspecified · Large Fingerling
3,3753.2 in average
Depth FAQ
How deep is Largon Lake?
Largon Lake is 10 feet deep at its deepest point and averages about 6 feet, according to Wisconsin DNR records.
Is there a free depth map of Largon Lake?
Yes. LakeList publishes a free interactive depth contour map of Largon 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 Largon 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