LakeList
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Long Lake
Enhanced dataInteractive depth contours
Long LakeWashburn County, WI
Contours load with map
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 11-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 Long Lake.
Start here
Fishing forecast
Best windows for Long 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
Long 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
Historical volunteer-monitoring record for this lake.
Last sampled Jul 1979
The last DNR samples for this lake are from 1979, when the water showed elevated algae (chlorophyll ~17 µg/L) and elevated nutrients (phosphorus ~47 µg/L). After 47 years without samples, these readings describe the lake as it was, not as it is.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 1979 | — | 17.0 µg/L (1) | 47.0 µg/L (1) |
Little Long Lake - Little Long LakeStation 664017
Historical record only — no current water-quality data exists for this lake. 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
Long Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Long 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 2664500 · 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.
83surface acres
11max depth feet
0public access points
45.7360, -91.9528latitude, 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
PanfishLargemouth BassNorthern PikeWalleye
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2024, when 850 fish were recorded across 1 entry.
2024
WalleyeUnspecified · Large Fingerling
85010.0 in average
2021
WalleyeUnspecified · Large Fingerling
57410.0 in average
2021
Yellow PerchUnspecified · Adult
9987.0 in average
2021
Yellow PerchUnspecified · Large Fingerling
3496.0 in average
2017
WalleyeMississippi Headwaters · Large Fingerling
5009.0 in average
2015
WalleyeUnspecified · Large Fingerling
5128.0 in average
2010
WalleyeMississippi Headwaters · Small Fingerling
3,9201.7 in average
Depth FAQ
How deep is Long Lake?
Long Lake is 11 feet deep at its deepest point and averages about 6 feet, according to Wisconsin DNR records.
Is there a free depth map of Long Lake?
Yes. LakeList publishes a free interactive depth contour map of Long Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from LakeList depth model survey data.
Where does the Long 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 2026-05-25
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