Mosinee Flowage
Marathon County, Wisconsin · WBIC 1434900
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
994 acres
Max depth
18 ft
DNR lake type
Complex, Riverine
Water clarity
2 ft
Low, measured Jul 2001
A river-like water type, with flow instead of a still basin. 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 1982), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
2 ft Secchi depthLowOlder reading
Last measured Jul 11, 2001. 2 readings on record, 2001.
Only a few readings are on record.
Nothing has been measured in the last 5 years, so this may not match the lake today.
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 MOSINEE FLOWAGE - DEEP HOLE ABOVE DAM. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 13 (Apr 2 to Apr 22)
- Surface reaches 48°Fabout Apr 21 (Apr 15 to Apr 29)
- Surface reaches 64°Fabout May 20 (May 14 to May 25)
- June surface72°F, usually 71 to 74°F
- July surface79°F, usually 77 to 80°F
- August surface75°F, usually 73 to 77°F
Mixes regularly through the summer instead of forming a warm top layer.
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 2017 (large fingerling and yearling); stocked in 3 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
- 1River Park Boat RampBoat ramp · Gravel surface · City
Directions - 2Canoe Portage Park LaunchBoat ramp · Concrete surface · City
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
Water level and flow
- WISCONSIN RIVER AT MOSINEE, WIGage height
U.S. Geological Survey gauges at or beside this lake. Readings are provisional and fetched when you open the page.
More lakes in Marathon County
- Lake Du Bay7.1 miles away
- Lake Wausau8.5 miles away
- Eau Claire Flowage (Schofield)9.0 miles away
- Big Eau Pleine Reservoir9.6 miles away
- Berkhahn Flowage (Townline)9.8 miles away
- Teal Flowage11 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
- Water level and flowU.S. Geological Survey gauges (readings are live), checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, 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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