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Bony Lake
Enhanced dataInteractive depth contours
Bony LakeBayfield County, WI
Contours load with map
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 13% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 55-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 Bony Lake.
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Fishing forecast
Best windows for Bony 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
Bony 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
From Wisconsin DNR / Citizen Lake Monitoring readings at Bony Lake - Near Deep Hole.
Sampled Sep 2025Volunteer monitoring since 2000
Very clear water — summer clarity of 20.5 ft puts it among the clearest tenth of monitored Wisconsin lakes.
Based on July–August 2025 averages across 2 volunteer readings.33Oligotrophic5-yr summer TSI
Very clear, low-nutrient water — often deep, with limited plant growth.
Water claritySecchi disk depth
20.5 ftJul–Aug 2025 avg (2 readings)
Crystal clearStable since 2013
Clearer than 100% of 596 monitored Wisconsin lakes with current readings.
No recent algae readings — last measured 2016. No recent nutrient readings — last measured 2010.
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 | 20.5 ft (2) | 1.0 µg/L (1) | — |
| 2024 | 20.0 ft (2) | — | — |
| 2023 | 22.0 ft (1) | 2.0 µg/L (1) | — |
| 2017 | 19.4 ft (7) | 2.0 µg/L (1) | — |
| 2016 | 18.2 ft (8) | 1.5 µg/L (2) | — |
| 2015 | 18.0 ft (7) | 1.0 µg/L (2) | — |
| 2014 | 20.8 ft (6) | 1.0 µg/L (2) | — |
| 2013 | 18.2 ft (6) | 1.5 µg/L (2) | — |
| 2012 | 17.0 ft (3) | 3.0 µg/L (1) | 10.0 µg/L (1) |
| 2010 | 19.4 ft (6) | 2.0 µg/L (2) | 8.0 µg/L (2) |
Latest individual samples: Secchi 30 ft (2025-09-24), chlorophyll-a 2 µg/L (2025-09-07), and total phosphorus 9 µg/L (2012-09-04).
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.
Bony Lake - Near Deep HoleStation 043154 · 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 maps1 converted map sheetFishing 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
Bony Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Bony 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 2742500 · 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 2007 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 contextBony Lake (WBIC 2742500) only
Human-reviewed population, catch, CPUE, effort, length and size-structure metrics for exact Bony Lake.
- Historical survey snapshot; not current regulations or navigation guidance.
- Stocking histories, regulations, recommendations, comparison-water values, creel values and unsupported chart-only values were excluded.
- For LakeList rows without WBIC values, deterministic migrations target the exact reviewed LakeList UUID plus canonical name, county and state; the source WBIC remains provenance only.
All fish
36 net-lifts2007 spring fyke net effort · p. 82.4 hours2007 spring electrofishing effort · p. 81.1 hours2007 fall electrofishing effort · p. 8
Black Crappie
4 fish2007 spring fyke net catch count · p. 10
Bluegill
203 fish2007 spring fyke net catch count · p. 10
Largemouth Bass
13 fish2007 survey catch count · p. 1013 fish2007 measured count · p. 1017.2 inches2007 mean length · p. 102.2 inches2007 length sd · p. 10
Muskellunge
1 fish2007 survey catch count · p. 941.4 inches2007 max length · p. 9
Northern Pike
3.4 fish/net-lift2007 fyke net cpue · p. 9123 fish2007 measured count · p. 914.2 inches2007 mean length · p. 94.9 inches2007 length sd · p. 9
Rock Bass
29 fish2007 spring fyke net catch count · p. 10
Smallmouth Bass
10 fish2007 survey catch count · p. 1010 fish2007 measured count · p. 1014.2 inches2007 mean length · p. 103.4 inches2007 length sd · p. 10
Walleye
597 fish2007 adult population estimate · p. 817 percent2007 population estimate cv · p. 83.1 fish/acre2007 adult population density · p. 864 index2007 psd · p. 8
Bony Lake fisheries survey, 2007-2008Matched by exact wbic name county and lakelist uuid · WBICs 2742500 · verified 2026-07-21Wisconsin DNR fisheries report; LakeList operator documented permission to leverage this public report with source attribution.
190surface acres
55max depth feet
0public access points
46.3176, -91.5072latitude, longitude
Access
Public access points
No mapped access points yet
LakeList has not matched a public launch, park, or shoreline access point for this lake yet.
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassNorthern PikePanfishSmallmouth BassWalleyeMusky
Depth FAQ
How deep is Bony Lake?
Bony Lake is 55 feet deep at its deepest point and averages about 23 feet, according to Wisconsin DNR records.
Is there a free depth map of Bony Lake?
Yes. LakeList publishes a free interactive depth contour map of Bony 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 Bony 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 Pagesname, coordinates, county, source identifiers
LakeList record updated 2026-05-25
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