Rock Lake

Jefferson County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)1,365
Maximum Depth (ft)60
Mean Depth (ft)16
Shoreline (miles)
Bottom Composition30% sand, 30% gravel, 0% rock, 40% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinDRAINAGE
Lake Classlake
Public Access
Township
GPS Coordinates43.07830° N, 88.93040° W
WBIC (DNR ID)830700

Fish Species

5 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Largemouth BassCommon
PanfishCommon
Smallmouth BassCommon
WalleyeCommon
Northern PikePresent

Boat Landings

4 landings

NameTypeRampTrailersFee
Boat Landing 1Public
Boat Landing 2Public
Boat Landing 3Public
Boat Landing 4Public

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
Hybrid Eurasian / Northern Water-MilfoilConfirmed
Spiny NaiadConfirmed
Yellow IrisConfirmed
Zebra MusselConfirmed

Data sourced from Wisconsin DNR lake surveys. Last scraped: 3/24/2026.

Rock Lake — Facts & Figures | Stay Northern