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Tomahawk Lake
Enhanced dataInteractive depth contours
Tomahawk LakeOneida County, WI
Contours load with map Access
Interactive depth contours10-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 84% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 84-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 Tomahawk Lake.
Start here
Fishing forecast
Best windows for Tomahawk 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
Tomahawk 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
Historical volunteer-monitoring record for this lake.
Last sampled date unknown
Individual readings are not retained for this lake — the index below is what the monitoring record summarizes.
38 five-year summer trophic state index · Oligotrophic. Very clear, low-nutrient water — often deep, with limited plant growth.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2025 | — | — | — |
Tomahawk Lake - Herbicide Site Echo2Station 10052548 · TSI based on chlorophyll
Historical record only — no current water-quality data exists for this lake. LakeList verified 2026-07-12.What visitors and local sources report
Lake experiences
Dated, source-linked observations about swimming and other lake activities. These are historical reports, not live conditions or a safety grade.
SwimmingSwimmer's itch
Swimmer's itch appeared in a lake survey
The Tomahawk Lake comprehensive management plan's 2015 survey appendix included swimmer's itch among residents' written concerns. It is a historical community concern, not a current advisory.
Tomahawk Lake Comprehensive Lake Management Plan appendicesRead reports in context.
Conditions can change by date and shoreline. A report does not establish a lake-wide or current hazard, and no indexed report does not mean an issue has never occurred. Check current official notices before entering the water.
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 maps3 converted map sheetsView 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
Tomahawk Lake depth maps
3 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Tomahawk 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 1542700 · 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 2024 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 contextCombined two-lake 2024 fishery assessment; every metric explicitly retains Tomahawk-and-Little-Tomahawk combined scope and must not be read as Tomahawk Lake alone.
DNR documented moderate panfish and bass catch rates, low sampled muskellunge and northern-pike abundance, and an estimated 16,658 adult walleyes across the connected two-lake survey scope.
- The public snapshot combines Tomahawk and Little Tomahawk lakes and prints no source WBIC; target WBIC 1542700 is only an exact LakeList migration gate.
- No metric is represented as Tomahawk-Lake-only.
- Historical comparisons and qualitative percentile classifications are excluded.
Black crappie
288 fishTotal captured · p. 111.2 fish/mileSurvey CPUE · p. 15.2 inchesminimum captured length · p. 112.7 inchesmaximum captured length · p. 1
Bluegill
331 fishTotal captured · p. 2112.8 fish/mileSurvey CPUE · p. 21.5 inchesminimum captured length · p. 28.6 inchesmaximum captured length · p. 2
Largemouth bass
164 fishTotal captured · p. 29.9 fish/mileSurvey CPUE · p. 27.6 inchesminimum captured length · p. 217.3 inchesmaximum captured length · p. 2
Muskellunge
37 fishTotal captured · p. 30.3 fish/net-nightSurvey CPUE · p. 311.7 inchesminimum captured length · p. 345.5 inchesmaximum captured length · p. 3
Northern pike
22 fishTotal captured · p. 30.2 fish/net-nightSurvey CPUE · p. 318.6 inchesminimum captured length · p. 327.6 inchesmaximum captured length · p. 3
Smallmouth bass
57 fishTotal captured · p. 44.8 fish/mileSurvey CPUE · p. 45.2 inchesminimum captured length · p. 416.4 inchesmaximum captured length · p. 4
Walleye
3,392 fishTotal captured · p. 47.5 inchesminimum captured length · p. 429 inchesmaximum captured length · p. 416.3 inchesmean captured length · p. 4
2024 Fishery Snapshot: Tomahawk and Little Tomahawk Lakes, Oneida CountyMatched by exact lakelist id name county state and target wbic with combined source scope · WBICs · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this report with source attribution.
3,462surface acres
84max depth feet
4public access points
45.8252, -89.6710latitude, longitude
Access
Public access points
Boat launchAccess at Indian Mounds Campground45.82776, -89.63755Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchKatherine - Tomahawk Channel45.81527, -89.69115Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchKatherine-Tomahawk Channel Carry-in Access45.81353, -89.69428Managed by TOWNSHIPTOWN OF HAZELHURSTRamp surface: UnimprovedLanding type: CARRY-INADA-accessible feature: NoVerified 2026-07-12
Boat launchLake Tomahawk Park Boat Launch45.81662, -89.60042Managed by TOWNSHIPTOWN OF LAKE TOMAHAWKRamp surface: PavedADA-accessible feature: YesVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
MuskyPanfishSmallmouth BassWalleyeLargemouth BassNorthern Pike
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2025, when 735 fish were recorded across 1 entry.
2025
MuskellungeUpper Wisconsin River · Large Fingerling
73511.2 in average
2024
WalleyeUpper Wisconsin River · Large Fingerling
17,2877.2 in average
2023
MuskellungeUpper Wisconsin River · Large Fingerling
86311.0 in average
2022
WalleyeMississippi Headwaters · Large Fingerling
34,4567.1 in average
2021
MuskellungeUpper Wisconsin River · Large Fingerling
86512.3 in average
2020
WalleyeMississippi Headwaters · Large Fingerling
34,5727.1 in average
2019
MuskellungeUpper Wisconsin River · Large Fingerling
2,10711.2 in average
2018
WalleyeMississippi Headwaters · Large Fingerling
34,5717.5 in average
2017
MuskellungeUpper Wisconsin River · Large Fingerling
711.0 in average
2017
MuskellungeUpper Wisconsin River · Large Fingerling
2,74710.8 in average
2016
WalleyeMississippi Headwaters · Large Fingerling
34,5887.6 in average
2014
MuskellungeUpper Wisconsin River · Large Fingerling
3,43511.3 in average
Showing the 12 most recent records from 15 published entries.
Depth FAQ
How deep is Tomahawk Lake?
Tomahawk Lake is 84 feet deep at its deepest point and averages about 33 feet, according to Wisconsin DNR records.
Is there a free depth map of Tomahawk Lake?
Yes. LakeList publishes a free interactive depth contour map of Tomahawk Lake at a typical 10-foot interval, with an optional 3D underwater view, derived from C-MAP Genesis community sonar (derived) survey data.
Where does the Tomahawk 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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