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Mayflower Lake
Enhanced dataInteractive depth contours
Mayflower LakeMarathon 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 75% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 16-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 Mayflower Lake.
Start here
Fishing forecast
Best windows for Mayflower 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
Mayflower 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.
DNR water check
Water quality quick take
Historical volunteer-monitoring record for this lake.
Last sampled Jun 2014Volunteer monitoring 1973–2014
DNR volunteers monitored this lake for about 41 years, ending in 2014. Its final monitored summers showed slight haze water (~7.9 ft Secchi) in 2012, low algae (chlorophyll ~3 µg/L) in 2000, and low nutrients (phosphorus ~16.3 µg/L) in 2012. After 12 years without samples, these readings describe the lake as it was, not as it is.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2013 | 7.0 ft (1) | — | — |
| 2012 | 7.9 ft (3) | — | 16.3 µg/L (3) |
| 2011 | 6.0 ft (2) | — | 24.0 µg/L (1) |
| 2000 | 5.5 ft (1) | 3.0 µg/L (1) | 16.0 µg/L (1) |
| 1973 | — | — | 40.0 µg/L (1) |
Mayflower Lake - Deep HoleStation 373124
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 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
Mayflower Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Mayflower 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 310500 · 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.
99surface acres
16max depth feet
1public access points
44.9122, -89.2557latitude, longitude
Access
Public access points
Boat launchAccess44.90930, -89.24614Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassNorthern PikeWalleye
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2024, when 500 fish were recorded across 1 entry.
2024
WalleyeUpper Wisconsin River · Large Fingerling
5008.0 in average
2022
WalleyeUnspecified · Large Fingerling
7507.0 in average
2021
WalleyeUnspecified · Large Fingerling
7207.0 in average
2021
WalleyeMississippi Headwaters · Small Fingerling
3,5002.1 in average
2019
WalleyeMississippi Headwaters · Small Fingerling
3,7952.0 in average
2018
WalleyeUnspecified · Large Fingerling
1,2757.0 in average
2017
WalleyeUnspecified · Large Fingerling
1,2757.0 in average
2017
WalleyeMississippi Headwaters · Small Fingerling
3,4491.7 in average
2016
WalleyeUnspecified · Large Fingerling
1,2757.0 in average
2015
WalleyeUnspecified · Large Fingerling
7507.0 in average
2015
WalleyeUnspecified · Small Fingerling
5007.0 in average
2015
WalleyeLake Michigan · Small Fingerling
3,9611.7 in average
Showing the 12 most recent records from 23 published entries.
Depth FAQ
How deep is Mayflower Lake?
Mayflower Lake is 16 feet deep at its deepest point and averages about 7 feet, according to Wisconsin DNR records.
Is there a free depth map of Mayflower Lake?
Yes. LakeList publishes a free interactive depth contour map of Mayflower 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 Mayflower 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 2026-07-14
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