Lake Monona

Dane County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)3,359
Maximum Depth (ft)74
Mean Depth (ft)27
Shoreline (miles)—
Bottom Composition30% sand, 25% gravel, 5% rock, 40% muck
Water Clarity — Secchi Depth (ft)—
Trophic Status—
Drainage BasinDRAINAGE
Lake Classlake
Public Access—
Township—
GPS Coordinates43.06830° N, 89.35810° W
WBIC (DNR ID)804600

Fish Species

8 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
PanfishAbundant—
Largemouth BassCommon—
Northern PikeCommon—
WalleyeCommon—
CatfishPresent—
MuskyPresent—
Smallmouth BassPresent—
SturgeonPresent—

Boat Landings

5 landings

NameTypeRampTrailersFee♿
Winnequah Trail Boat RampRAMP—1-5YesYes
Tonyawatha Park Boat RampRAMP—1-5YesYes
Olin-Turville Park Boat RampRAMP—Gr25YesYes
Olbrich Park Boat RampRAMP—Gr25YesYes
Law Park Boat LandingRAMP—0YesYes

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
Banded Mystery SnailConfirmed—
Chinese Mystery SnailConfirmed—
Curly-Leaf PondweedConfirmed—
Eurasian Water-MilfoilConfirmed—
Spiny WaterfleaConfirmed—
Zebra MusselConfirmed—

Data sourced from Wisconsin DNR lake surveys. Last scraped: 4/30/2026.