Mosinee Flowage

Marathon County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)716
Maximum Depth (ft)18
Mean Depth (ft)—
Shoreline (miles)—
Bottom Composition29% sand, 5% gravel, 6% rock, 60% muck
Water Clarity — Secchi Depth (ft)—
Trophic Status—
Drainage BasinDRAINAGE
Lake Classflowage
Public Access—
Township—
GPS Coordinates44.79740° N, 89.69910° W
WBIC (DNR ID)1434900

Fish Species

6 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Northern PikeCommon—
Smallmouth BassCommon—
WalleyeCommon—
Largemouth BassPresent—
MuskyPresent—
PanfishPresent—

Boat Landings

2 landings

NameTypeRampTrailersFee♿
Canoe Portage Park LaunchRAMP—1-5NoNo
River Park Boat RampRAMP—16-20NoNo

Invasive Species

Invasive species have been documented in or near this lake. Please clean, drain, and dry all watercraft and equipment before leaving to prevent spread.

SpeciesStatusFirst Detected
Purple LoosestrifeConfirmed—

Data sourced from Wisconsin DNR lake surveys. Last scraped: 4/29/2026.

Mosinee Flowage — Facts & Figures | Stay Northern