Lake Kegonsa

Dane County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)3,200
Maximum Depth (ft)32
Mean Depth (ft)17
Shoreline (miles)—
Bottom Composition70% sand, 14% gravel, 1% rock, 15% muck
Water Clarity — Secchi Depth (ft)—
Trophic Status—
Drainage BasinDRAINAGE
Lake Classlake
Public Access—
Township—
GPS Coordinates42.96460° N, 89.25360° W
WBIC (DNR ID)802600

Fish Species

7 species documented

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

Boat Landings

4 landings

NameTypeRampTrailersFee♿
Lake Kegonsa State Park Boat AccessRAMP—Gr25YesYes
Lake KegonsaRAMP—6-10YesNo
Amundsons LandingRAMP—1-5NoYes
Fish Camp Launch Park Boat RampRAMP—21-25YesYes

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
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.