Sea Lion Lake

Florence County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)114
Maximum Depth (ft)82
Mean Depth (ft)16
Shoreline (miles)—
Bottom Composition35% sand, 5% gravel, 0% rock, 60% muck
Water Clarity — Secchi Depth (ft)—
Trophic Status—
Drainage BasinDRAINAGE
Lake Classlake
Public Access—
Township—
GPS Coordinates45.87740° N, 88.32290° W
WBIC (DNR ID)672300

Fish Species

5 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
PanfishAbundant—
Largemouth BassCommon—
Northern PikeCommon—
Smallmouth BassPresent—
WalleyePresent—

Boat Landings

1 landing

NameTypeRampTrailersFee♿
Sea Lion Lake AccessRAMP—6-10YesNo

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—
Eurasian Water-MilfoilConfirmed—
Hybrid Eurasian / Northern Water-MilfoilConfirmed—
Zebra MusselConfirmed—

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

Sea Lion Lake — Facts & Figures | Stay Northern