Lower Nemahbin Lake

Waukesha County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)239
Maximum Depth (ft)36
Mean Depth (ft)—
Shoreline (miles)—
Bottom Composition10% sand, 30% gravel, 0% rock, 60% muck
Water Clarity — Secchi Depth (ft)—
Trophic Status—
Drainage BasinDRAINAGE
Lake Classlake
Public Access—
Township—
GPS Coordinates43.04800° N, 88.43440° W
WBIC (DNR ID)827000

Fish Species

5 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Largemouth BassCommon—
Northern PikePresent—
PanfishPresent—
Smallmouth BassPresent—
WalleyePresent—

Boat Landings

2 landings

NameTypeRampTrailersFee♿
Nemahbin Lakes Boat RampRAMP—11-15YesNo
——————

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—
Hybrid Eurasian / Northern Water-MilfoilConfirmed—
Ornamental water lilies (non-native Nymphaea sp.)Confirmed—
Purple LoosestrifeConfirmed—
Spiny NaiadConfirmed—
Starry StonewortConfirmed—
Zebra MusselConfirmed—

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