Slim Lake
Washburn County, Wisconsin · WBIC 2109300
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
224 acres
Max depth
42 ft
DNR lake type
Complex, Two Story
Water clarity
16.5 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
Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1971), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
16.5 ft Secchi depthClear
Last measured Sep 29, 2025. 300 readings on record, 1997 to 2025.
Typical summer clarity (June to September): 11.8 ft, clear, from 101 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 SLIM LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
Last measured Jul 28, 2025, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 19 (Apr 13 to Apr 29)
- Surface reaches 48°Fabout May 2 (Apr 23 to May 9)
- Surface reaches 64°Fabout May 27 (May 23 to Jun 5)
- June surface70°F, usually 68 to 71°F
- July surface76°F, usually 75 to 77°F
- August surface73°F, usually 71 to 75°F
Forms a warm top layer around May 5, lasting about 164 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.
Stocking history
- Walleyelast stocked 2025 (large fingerling and small fingerling); stocked in 8 years since 2010
Stocking shows what was added to the lake, not what is in it now.
Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.
Boat landings
- 1Slim Lake Public AccessBoat ramp · Concrete surface · State(dnr)
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Washburn County
- Snag Lake1.4 miles away
- West Lake2.0 miles away
- Loyhead Lake2.0 miles away
- Wolf Lake2.4 miles away
- Pickerel Lake2.8 miles away
- Scoot Lake2.9 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
- Stocking historyWisconsin DNR annual fish stocking summary, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Boat landingsWisconsin DNR public boat access sites, 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
- 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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