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Cox Hollow Lake
Enhanced dataInteractive depth contours
Cox Hollow LakeIowa 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 72% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 28-ft maximum depth. More accurate than a pure model, but still an estimate. Not for navigation.LakeList assistant
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Fishing spots, food, lodging, marinas, and rentals around Cox Hollow Lake.
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Fishing forecast
Best windows for Cox Hollow 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
Cox Hollow Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
76°FPeak summer
Seasonal estimate. Checking current National Weather Service air temperatures…
Warmest water of the year. Fish hold deeper or feed in low light; swimming and watersports are at their best.
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 GrowthPollutants: Unknown Pollutant
- Status
- 303d Listed
- 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 2025-02-10 · 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
Cox Hollow Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Cox Hollow 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 1246500 · 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 2022 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 contextThe report is specific to Cox Hollow Lake and combines distinct SN1 mark, SE1 recapture, SE2 centrarchid and fall juvenile-walleye samples. Values use the detailed species-results narrative and preserve gear-specific scope.
The 2022 comprehensive survey estimated moderate stocked adult walleye density, found high yellow perch and largemouth bass abundance, excellent bluegill size and condition, increased black crappie and pumpkinseed, and no documented young-of-year walleye recruitment.
- The report contains internal count and CPUE conflicts: its summary/table gives 305 largemouth bass at 128.2/mile and 160.6 bluegill/mile, while detailed species narratives give 303 bass at 127.4/mile and 383 bluegill at 372/mile. LakeList retains the detailed species-narrative values and documents the conflict.
- Walleye are stocking-dependent; the report recommends maintaining 2-4 walleye over 15 inches per acre and continuing large-fingerling stocking.
Black crappie
47 fishBlack crappie captured · p. 96.8 inchesMinimum black crappie length · p. 910.7 inchesMaximum black crappie length · p. 98.6 inchesAverage black crappie length · p. 9
Bluegill
383 fishBluegill captured · p. 9372 fish/mileBluegill CPUE · p. 92.7 inchesMinimum bluegill length · p. 99.4 inchesMaximum bluegill length · p. 9
Largemouth bass
303 fishLargemouth bass captured · p. 8127.4 fish/mileLargemouth bass CPUE · p. 86.1 inchesMinimum largemouth bass length · p. 821 inchesMaximum largemouth bass length · p. 8
Pumpkinseed
50 fishPumpkinseed captured · p. 95.8 inchesMinimum pumpkinseed length · p. 97.8 inchesMaximum pumpkinseed length · p. 96.9 inchesAverage pumpkinseed length · p. 9
Walleye
222 fishAdult walleye marked · p. 847 fishAdult walleye recaptured · p. 8315 adult fishEstimated adult walleye population · p. 83.9 adult fish/acreEstimated adult walleye density · p. 8
Yellow perch
602 fishYellow perch captured · p. 87.5 fish/net-nightYellow perch CPUE · p. 84.3 inchesMinimum yellow perch length · p. 89.2 inchesMaximum yellow perch length · p. 8
Cox Hollow Lake comprehensive survey 2022Matched by exact lakelist id name county state wbic · WBICs 1246500 · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this report with source attribution.
81surface acres
28max depth feet
1public access points
43.0088, -90.1105latitude, longitude
Access
Public access points
Boat launchAccess43.01344, -90.11487Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
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Fishery
Notable species
PanfishLargemouth BassWalleye
Depth FAQ
How deep is Cox Hollow Lake?
Cox Hollow Lake is 28 feet deep at its deepest point, according to Wisconsin DNR records.
Is there a free depth map of Cox Hollow Lake?
Yes. LakeList publishes a free interactive depth contour map of Cox Hollow 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 Cox Hollow 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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