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Lake Mallalieu
Available dataInteractive depth contours
Lake MallalieuSt. Croix 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 57% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 17-ft maximum depth. More accurate than a pure model, but still an estimate. Not for navigation.LakeList assistant
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Fishing spots, food, lodging, marinas, and rentals around Lake Mallalieu.
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Fishing
Fishing at Lake Mallalieu
Angler reports · Fishbrain
What anglers catch here
Anglers have logged 295 catches on Lake Mallalieu via Fishbrain — 1 in the last 30 days, most recently on Jul 25, 2026.
Most-reported species
- Smallmouth bass
- Largemouth bass
- Rock bass
- Walleye
- Northern pike
- Bluegill
Show 5 more species
- Freshwater drum
- Brown trout
- White bass
- Black crappie
- Common carp
86 of the 295 logged catches didn’t name a species and aren’t listed above.
Seasonality
All fishOf the 295 logged catches, 243 carry a month and 231 carry a year; the charts cover those.
2024 had the most reports (99).
Counts reflect reporting activity, not fish populations. Waterbody location is provider-level; exact spots and angler details aren’t shown.
Fishery details for this lakeExplore this area on FishbrainNWS weather
Weather windows
Weather-based planning from the National Weather Service hourly forecast near this lake — not a catch forecast.
Loading latest forecast…
Checking wind, precipitation, and near-term weather windows.
Water temperature
Lake Mallalieu water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
69°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.
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
Lake Mallalieu depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Mallalieu 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 2607100 · 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.
289surface acres
17max depth feet
0public access points
44.9901, -92.7437latitude, 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
Depth FAQ
How deep is Lake Mallalieu?
Lake Mallalieu is 17 feet deep at its deepest point, according to Wisconsin DNR records.
Is there a free depth map of Lake Mallalieu?
Yes. LakeList publishes a free interactive depth contour map of Lake Mallalieu 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 Lake Mallalieu 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 2026-07-14
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