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Sevenmile Lake
Enhanced dataInteractive depth contours
Sevenmile LakeOneida 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 43-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 Sevenmile Lake.
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Fishing forecast
Best windows for Sevenmile 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
Sevenmile Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
71°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.
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Sevenmile Lake - Deep Hole.
Last sampled Oct 2022
Through 2022, somewhat hazy but low-algae water — summer clarity of 9.8 ft is lower than most monitored Wisconsin lakes.
Based on July–August 2022 averages across 4 volunteer readings.Water claritySecchi disk depth
9.8 ftJul–Aug 2022 avg (2 readings)
Slight hazeImproving — up ~15% vs earlier years
Clearer than 44% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
4.5 µg/LJul–Aug 2022 avg (2 readings)
LowImproving — down ~49% vs earlier years
No recent nutrient readings — last measured 2012.
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 | 9.8 ft (2) | 4.5 µg/L (2) | — |
| 2021 | 12.6 ft (2) | 3.0 µg/L (2) | 14.0 µg/L (1) |
| 2020 | 6.7 ft (2) | 2.0 µg/L (1) | — |
| 2016 | 8.5 ft (1) | 8.0 µg/L (1) | — |
| 2014 | 8.1 ft (3) | 4.5 µg/L (2) | — |
| 2013 | 8.8 ft (2) | 6.0 µg/L (2) | — |
| 2012 | 11.1 ft (5) | 3.6 µg/L (5) | 15.2 µg/L (5) |
| 2011 | 7.7 ft (4) | 6.0 µg/L (3) | 16.0 µg/L (3) |
| 2010 | 8.2 ft (3) | 5.3 µg/L (3) | 16.7 µg/L (3) |
| 2009 | 8.0 ft (2) | 5.0 µg/L (2) | 18.0 µg/L (2) |
Latest individual samples: Secchi 7.9 ft (2022-10-19), chlorophyll-a 2 µg/L (2022-10-19), and total phosphorus 24 µg/L (2022-06-14).
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.
Sevenmile Lake - Deep HoleStation 443253
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
Sevenmile Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Sevenmile 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 1605800 · 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.
518surface acres
43max depth feet
2public access points
45.8799, -89.0517latitude, longitude
Access
Public access points
Boat launchAccess at End Of 7 Mile Lake Rd45.88023, -89.04127Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchSevenmile Lake Access45.87918, -89.05668Managed by TOWNSHIPTOWN OF THREE LAKESRamp surface: Concrete PanelsADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
WalleyeLargemouth BassMuskyNorthern PikePanfishSmallmouth Bass
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2024, when 19,947 fish were recorded across 1 entry.
2024
WalleyeUpper Wisconsin River · Small Fingerling
19,9471.8 in average
2022
WalleyeMississippi Headwaters · Small Fingerling
17,6052.2 in average
2021
WalleyeMississippi Headwaters · Large Fingerling
1,9977.0 in average
2020
WalleyeMississippi Headwaters · Small Fingerling
17,4052.0 in average
2019
WalleyeMississippi Headwaters · Large Fingerling
1,9885.1 in average
2018
WalleyeMississippi Headwaters · Small Fingerling
17,6022.1 in average
2017
WalleyeUnspecified · Large Fingerling
3,0007.0 in average
2016
WalleyeMississippi Headwaters · Small Fingerling
17,6052.0 in average
2015
WalleyeMississippi Headwaters · Small Fingerling
17,6051.9 in average
2014
WalleyeMississippi Headwaters · Small Fingerling
19,9581.6 in average
2013
WalleyeMississippi Headwaters · Large Fingerling
1,4966.0 in average
2012
WalleyeMississippi Headwaters · Small Fingerling
17,5951.7 in average
Showing the 12 most recent records from 14 published entries.
Depth FAQ
How deep is Sevenmile Lake?
Sevenmile Lake is 43 feet deep at its deepest point and averages about 19 feet, according to Wisconsin DNR records.
Is there a free depth map of Sevenmile Lake?
Yes. LakeList publishes a free interactive depth contour map of Sevenmile 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 Sevenmile 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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