Bony Lake
Bayfield County, Wisconsin · WBIC 2742500
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
191 acres
Max depth
55 ft
DNR lake type
Complex, Two Story
Water clarity
30 ft
Clear, measured Sep 2025
A deep lake type that can hold a cold layer below the warm surface in summer. This describes the lake type in general, not this lake in particular.
Outline
Drawn from the DNR's 24K hydrography (surveyed 1984), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
30 ft Secchi depthClear
Last measured Sep 24, 2025. 148 readings on record, 2000 to 2025.
Typical summer clarity (June to September): 18.5 ft, clear, from 77 readings (2012 to 2025).
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. Clear means a Secchi depth of 10 feet or more, moderate 5 to 10 feet, low under 5 feet.
Wisconsin DNR water monitoring (volunteer and staff), via the Water Quality Portal; station BONY LAKE - NEAR DEEP HOLE. Checked Oct 23, 2026.
Water temperature
Last measured Aug 22, 2025, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 24 (Apr 16 to Apr 29)
- Surface reaches 48°Fabout May 6 (May 2 to May 10)
- Surface reaches 64°Fabout May 29 (May 27 to Jun 6)
- June surface69°F, usually 67 to 70°F
- July surface75°F, usually 74 to 76°F
- August surface72°F, usually 71 to 74°F
Forms a warm top layer around May 6, lasting about 155 days.
A computer model of this lake's typical weather and water, built from 15 years, 2005 to 2019. Ranges show the middle half of years. The model was not calibrated against measured temperatures for this lake. It is an estimate, not a measurement.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). Modeled: U.S. Geological Survey lake temperature data release (doi:10.5066/P9CA6XP8).
Today at the lake
Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.
Fish recorded near this lake
- Bluegill Lepomis macrochirus1963; 1 record
- Largemouth Bass Micropterus salmoides1963; 1 record
- Walleye Sander vitreus1963; 1 record
- Yellow Perch Perca flavescens1963; 1 record
Recorded in open fish survey and museum records (GBIF). A record shows a fish was found near this lake in that year, not that it is there now, and says nothing about how many. Most coordinates are rounded to about 1 km, so a record is attached only when one lake is the clear match.
Open fish survey and museum records from GBIF; datasets are listed on the sources page. Checked Oct 23, 2026.
More lakes in Bayfield County
- Pickerel Lake0.8 miles away
- Birch Lake0.8 miles away
- Robinson Lake1.0 miles away
- Upper Eau Claire Lake1.4 miles away
- Idlewild Lake1.4 miles away
- Henderson Lake1.5 miles away
Where this comes from
- Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
- OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Typical-year temperatureU.S. Geological Survey lake temperature model (modeled estimate), checked Oct 23, 2026
- Fish recordedOpen fish survey and museum records, via GBIF, checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Depth map linkWisconsin DNR lake maps list, checked Oct 24, 2026
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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