Long Lake
Forest County, Wisconsin · WBIC 677400
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
340 acres
Max depth
23 ft
DNR lake type
Complex, Cool, dark water color
A cool-water lake type: the DNR groups it with lakes that stay cooler through 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 1991), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity (satellite estimate)
- Summer 20164 ft (1,128 satellite pixels)
- Summer 20178.4 ft (838 satellite pixels)
No one has measured this lake's clarity in the monitoring data. These are estimates from satellite images of two summers only, so they may not match the lake today.
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. The estimate tops out at 16 feet.
Landsat satellite estimates published by the Wisconsin DNR (summers 2016 and 2017), averaged over the lake's outline. Informational use only.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 21 (Apr 14 to Apr 28)
- Surface reaches 48°Fabout Apr 30 (Apr 21 to May 8)
- Surface reaches 64°Fabout May 29 (May 24 to Jun 5)
- June surface69°F, usually 68 to 71°F
- July surface75°F, usually 74 to 76°F
- August surface71°F, usually 70 to 73°F
Forms a warm top layer around Jun 12, lasting about 34 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.
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
- Muskellungelast stocked 2025 (large fingerling); stocked in 7 years since 2010
- Black Crappielast stocked 2021 (large fingerling and yearling); stocked in 3 years since 2010
- Walleyelast stocked 2017 (large fingerling); stocked in 4 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
- 1Long Lake Access (listed under Florence County)Boat ramp · Gravel surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Forest County
- Bastile Lake3.5 miles away
- Little Wapoose Lake5.2 miles away
- Wapoose Lake5.4 miles away
- Rat Lake5.7 miles away
- Mainline Lake6.0 miles away
- Stevens Lake6.2 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
- 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
- Satellite clarity estimateLandsat summer clarity estimates published by the Wisconsin DNR (2016, 2017), 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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