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Upper Turtle Lake
Enhanced dataInteractive depth contours
Upper Turtle LakeBarron 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 66% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 25-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 Upper Turtle Lake.
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Fishing forecast
Best windows for Upper Turtle 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
Upper Turtle Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
74°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.
Wisconsin DNR water assessment
Impaired waterbody listed
The DNR lists this waterbody as impaired. This notice is not itself a closure; review the official assessment and current guidance before your trip.
303(d) / impairment recordRecreation restrictions noted
Excess Algal Growth, EutrophicationPollutants: Total Phosphorus, Unknown Pollutant
- Status
- 303d Listed, Pollutant Removed
- Public health
- General Advice
- Recreation
- Recreational Restrictions
- Aquatic life
- Not specified
Water is impaired due to one or more pollutants and associated quality impacts.
Review DNR water quality Check consumption advice Source updated 2026-03-25 · LakeList verified 2026-07-12
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.
59 five-year summer trophic state index · Eutrophic. Nutrient-rich, greener water — more algae and plant growth, common in shallower lakes.
Listed as impaired on the DNR/EPA water-condition assessment — see the notice on this page for details.Upper Turtle Lake - Deep HoleStation 033175 · TSI based on Secchi
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
Upper Turtle Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Upper Turtle 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 2079800 · 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 2021 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 contextA 2021 comprehensive Upper Turtle Lake survey assessed walleye, bass and panfish with spring netting and electrofishing, fall electrofishing and a walleye mark-recapture estimate.
A 2021 comprehensive Upper Turtle Lake survey assessed walleye, bass and panfish with spring netting and electrofishing, fall electrofishing and a walleye mark-recapture estimate.
- Historical fisheries snapshot; not current fishing regulations or navigation guidance.
- Only metrics explicitly supported by the cited source page were promoted.
- Population estimates, relative-abundance indices and size thresholds retain their source scope.
Bluegill
202 fishSpring Electrofishing II catch · p. 1334.2 fish/mileSpring Electrofishing II CPUE · p. 1328.3 fish/mileCPUE for fish >=6 inches · p. 136.4 inchesAverage length · p. 13
Largemouth Bass
124 fishSpring Electrofishing II catch · p. 1021 fish/mileSpring Electrofishing II CPUE · p. 109.7 fish/mileCPUE for fish >=14 inches · p. 1113.6 inchesAverage length · p. 11
Walleye
885 fishAdult population estimate · p. 72 fish/acreAdult density · p. 79 fish/net nightSpring Netting I CPUE · p. 8235 fishSpring Netting I catch · p. 8
Upper Turtle Lake comprehensive survey, 2021Matched by exact wbic name county · WBICs 2079800 · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this public report with source attribution.
427surface acres
25max depth feet
2public access points
45.4220, -92.0950latitude, longitude
Access
Public access points
Boat launchAccess off Hwy 845.40739, -92.09084Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchUPPER TURTLE LAKE ACCESS45.40789, -92.08874Managed by COUNTYTOWN OF ALMENARamp surface: ConcreteADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassNorthern PikePanfishWalleye
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2024, when 4,196 fish were recorded across 1 entry.
2024
WalleyeChippewa/St. Croix · Large Fingerling
4,1967.1 in average
2022
WalleyeMississippi Headwaters · Large Fingerling
4,3897.0 in average
2020
WalleyeMississippi Headwaters · Large Fingerling
4,2687.2 in average
2018
WalleyeMississippi Headwaters · Large Fingerling
4,2686.3 in average
2016
WalleyeMississippi Headwaters · Large Fingerling
4,2707.2 in average
2014
WalleyeMississippi Headwaters · Large Fingerling
1,2306.0 in average
2014
WalleyeMississippi Headwaters · Large Fingerling
3,0306.3 in average
2011
WalleyeMississippi Headwaters · Small Fingerling
10,1682.3 in average
Depth FAQ
How deep is Upper Turtle Lake?
Upper Turtle Lake is 25 feet deep at its deepest point and averages about 14 feet, according to Wisconsin DNR records.
Is there a free depth map of Upper Turtle Lake?
Yes. LakeList publishes a free interactive depth contour map of Upper Turtle 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 Upper Turtle 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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