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Crystal Lake
Enhanced dataInteractive depth contours
Crystal LakeSheboygan 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 49% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 61-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 Crystal Lake.
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Fishing forecast
Best windows for Crystal 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
Crystal Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
73°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.
36 five-year summer trophic state index · Oligotrophic. Very clear, low-nutrient water — often deep, with limited plant growth.
Crystal Lake - Deep HoleStation 603120 · TSI based on chlorophyll
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
Crystal Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Crystal 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 45200 · 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 contextCrystal Lake (WBIC 45200) only; low gamefish catches and gear-effectiveness limits are retained and no unsupported population estimate is reported.
Human-reviewed, page-evidenced 2021 fisheries metrics for Crystal Lake (WBIC 45200).
- Historical fisheries snapshot; not current fishing regulations or navigation guidance.
- Only metrics explicitly supported by the cited source page were promoted.
- Relative-abundance indices, population estimates, gear limitations and size thresholds retain source scope.
Black Crappie
5 fishFish measured in 2021 spring fyke netting · p. 325.8 inchesAverage length in 2021 spring fyke netting · p. 324.3 inchesMinimum observed length in 2021 spring fyke netting · p. 328.2 inchesMaximum observed length in 2021 spring fyke netting · p. 32
Bluegill
249 fishFish measured in 2021 spring electrofishing · p. 264.9 inchesAverage length in 2021 spring electrofishing · p. 262 inchesMinimum observed length in 2021 spring electrofishing · p. 268.6 inchesMaximum observed length in 2021 spring electrofishing · p. 26
Largemouth Bass
62 fishFish measured in 2021 spring electrofishing · p. 2410.8 inchesAverage length in 2021 spring electrofishing · p. 242.9 inchesMinimum observed length in 2021 spring electrofishing · p. 2417.1 inchesMaximum observed length in 2021 spring electrofishing · p. 24
Northern Pike
16 fishFish measured in 2021 spring fyke netting · p. 218.1 inchesAverage length in 2021 spring fyke netting · p. 211 inchesMinimum observed length in 2021 spring fyke netting · p. 222.8 inchesMaximum observed length in 2021 spring fyke netting · p. 2
Pumpkinseed
3 fishFish measured in 2021 spring fyke netting · p. 326.7 inchesAverage length in 2021 spring fyke netting · p. 325.8 inchesMinimum observed length in 2021 spring fyke netting · p. 327.5 inchesMaximum observed length in 2021 spring fyke netting · p. 32
Rock Bass
129 fishSpring fyke-net catch · p. 27.5 inchesAverage length in 2021 spring fyke netting · p. 34.2 inchesMinimum observed length in 2021 spring fyke netting · p. 311.2 inchesMaximum observed length in 2021 spring fyke netting · p. 3
Walleye
37 fishFish measured in 2021 spring fyke netting · p. 1717.5 inchesAverage length in 2021 spring fyke netting · p. 179 inchesMinimum observed length in 2021 spring fyke netting · p. 1725.2 inchesMaximum observed length in 2021 spring fyke netting · p. 17
Yellow Perch
12 fishFish measured in 2021 spring fyke netting · p. 317.1 inchesAverage length in 2021 spring fyke netting · p. 315.4 inchesMinimum observed length in 2021 spring fyke netting · p. 3110.8 inchesMaximum observed length in 2021 spring fyke netting · p. 31
Crystal Lake comprehensive survey, 2021 [PDF]Matched by exact wbic name county · WBICs 45200 · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this public report with source attribution.
129surface acres
61max depth feet
1public access points
43.8063, -88.0130latitude, longitude
Access
Public access points
Boat launchCrystal Lake Boat Launch43.80359, -88.02095Managed by COUNTYTOWN OF PLYMOUTHRamp surface: ConcreteADA-accessible feature: YesVerified 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 2021, when 1,520 fish were recorded across 1 entry.
2021
WalleyeMississippi Headwaters · Large Fingerling
1,5207.3 in average
2019
WalleyeRock-Fox · Large Fingerling
1,5367.7 in average
2017
WalleyeRock-Fox · Large Fingerling
1,2907.3 in average
2017
WalleyeMississippi Headwaters · Large Fingerling
1,2823.3 in average
2015
WalleyeMississippi Headwaters · Large Fingerling
1,2827.7 in average
2013
WalleyeUnspecified · Large Fingerling
9987.0 in average
2012
WalleyeUnspecified · Large Fingerling
9998.0 in average
2012
WalleyeRock-Fox · Small Fingerling
4,0902.5 in average
2010
WalleyeUnspecified · Large Fingerling
7816.0 in average
2010
WalleyeRock-Fox · Small Fingerling
4,9061.7 in average
Depth FAQ
How deep is Crystal Lake?
Crystal Lake is 61 feet deep at its deepest point and averages about 20 feet, according to Wisconsin DNR records.
Is there a free depth map of Crystal Lake?
Yes. LakeList publishes a free interactive depth contour map of Crystal 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 Crystal 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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