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Turtle Lake
Enhanced dataInteractive depth contours
Turtle LakeWalworth County, WI
Contours load with map Access
Interactive depth contours5-foot typical interval · Modeled depth estimate · Not a survey · Not for navigation
Source: LakeList depth modelmedium confidence · QA passed · Select a contour to inspect its mapped depthModeled depth estimate: contours computed from the lake's shoreline shape and its documented 30-ft maximum depth (depth grows with distance from shore, calibrated to the documented mean depth where available). This is a smooth mathematical model, not a survey - real holes, bars, and drop-offs will differ. Community sonar (C-MAP Genesis) overlays where recorded. Not for navigation.LakeList assistant
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Fishing spots, food, lodging, marinas, and rentals around Turtle Lake.
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Fishing
Fishing at Turtle Lake
Fishery
Notable species
Largemouth BassNorthern PikePanfish
Angler reports · Fishbrain
What anglers catch here
Anglers have logged 110 catches on Turtle Lake via Fishbrain — none in the last 30 days.
Latest reported catch: Jun 13, 2026
Most-reported species
- Largemouth bass
- Northern pike
19 of the 110 logged catches didn’t name a species and aren’t listed above.
Seasonality
All fishOf the 110 logged catches, 86 carry a month and 79 carry a year; the charts cover those.
2022 had the most reports (30).
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 FishbrainWisconsin 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 contextTurtle Lake, Walworth County only; the public report prints exact lake name and county but not a WBIC, so sourceWaterbodyIds is empty and the LakeList target WBIC is used only as a migration identity guard.
Human-reviewed bluegill and largemouth-bass metrics from Turtle Lake electrofishing in 2017 and 2021.
- Historical survey snapshot; not current regulations or navigation guidance.
- The report does not print WBIC 795100; exact source identity is supported by Turtle Lake plus Walworth County, while migration also requires the queued LakeList WBIC.
- Other-species counts were explicitly described as too small for analysis and were not promoted.
Bluegill
5.8 inches2017 average length · p. 18.4 inches2017 maximum length · p. 144 percent2017 percent at least 6 inches · p. 168 fish/mile2017 electrofishing catch rate · p. 1
Largemouth Bass
11.1 inches2017 average length · p. 119.3 inches2017 maximum length · p. 112 percent2017 percent legal size · p. 155 fish/mile2017 electrofishing catch rate · p. 1
Turtle Lake spring electrofishing surveys, 2017 and 2021Matched by exact name county with lakelist wbic guard · WBICs · verified 2026-07-19Wisconsin DNR fisheries report; LakeList operator documented permission to leverage this public report with source attribution.
NWS 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
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.
72°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 record
NAPollutants: Unknown Pollutant
- Status
- Delist
- Public health
- General Advice
- Recreation
- Full Body Contact
- Aquatic life
- Not specified
Condition has remained stable; water is not impaired.
Review DNR water quality Check consumption advice Source updated 2026-03-24 · LakeList verified 2026-07-12
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Turtle Lake - Deep Hole.
Sampled Jun 2026Volunteer monitoring since 1993
Clear, low-algae water — summer clarity of 13.7 ft puts it among the clearest quarter of monitored Wisconsin lakes.
Based on July–August 2025 averages across 12 volunteer readings.41Mesotrophic5-yr summer TSI
Moderately clear with moderate nutrients — some algae and plant growth through the season.
Water claritySecchi disk depth
13.7 ftJul–Aug 2025 avg (10 readings)
ClearStable since 2018
Clearer than 78% of 591 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
2.5 µg/LJul–Aug 2025 avg (2 readings)
Very lowStable since 2018
No recent nutrient readings — last measured 2020.
Listed as impaired on the DNR/EPA water-condition assessment — see the notice on this page for details.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 |
|---|---|---|---|
| 2025 | 13.7 ft (10) | 2.5 µg/L (2) | — |
| 2024 | 10.5 ft (6) | 5.0 µg/L (2) | — |
| 2023 | 12.3 ft (8) | 2.5 µg/L (2) | — |
| 2022 | 9.4 ft (4) | 3.0 µg/L (2) | — |
| 2021 | 12.1 ft (4) | 2.5 µg/L (2) | — |
| 2020 | 12.4 ft (7) | 4.5 µg/L (2) | 16.0 µg/L (1) |
| 2019 | 9.0 ft (6) | 10.0 µg/L (1) | — |
| 2018 | 9.6 ft (6) | 4.5 µg/L (2) | — |
| 2017 | 9.7 ft (15) | 2.0 µg/L (1) | — |
| 2016 | 13.5 ft (2) | 2.0 µg/L (1) | — |
Latest individual samples: Secchi 7.5 ft (2026-06-23), chlorophyll-a 4 µg/L (2026-06-23), and total phosphorus 16 µg/L (2020-07-21).
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.
Turtle Lake - Deep HoleStation 653214 · TSI based on chlorophyll
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 maps2 converted map sheetsFishing 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
Turtle Lake depth maps
2 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
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 795100 · 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.
141surface acres
30max depth feet
1public access points
42.7265, -88.6810latitude, longitude
Access
Public access points
Boat launchTurtle Lake Ramp42.72828, -88.68884Managed by TOWNSHIPTOWN OF RICHMONDRamp surface: Concrete PlankADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Depth FAQ
How deep is Turtle Lake?
Turtle Lake is 30 feet deep at its deepest point, according to Wisconsin DNR records.
Is there a free depth map of Turtle Lake?
Yes. LakeList publishes a free interactive depth contour map of Turtle Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from LakeList depth model survey data.
Where does the Turtle Lake depth map come from?
The interactive depth contours are derived from LakeList depth model. Each contour set passes a visual QA review against the source document before it is published. The depths are a modeled estimate calibrated to the lake's documented maximum depth - not a survey, and not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Pagesname, coordinates, county, source identifiers
LakeList record updated 2026-07-12
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