Mallalieu Lake

St. Croix County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)289
Maximum Depth (ft)17
Mean Depth (ft)5
Shoreline (miles)
Bottom Composition75% sand, 10% gravel, 5% rock, 10% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinSEEPAGE
Lake Classflowage
Public Access
Township
GPS Coordinates44.99010° N, 92.74370° W
WBIC (DNR ID)2607100

Fish Species

4 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Largemouth BassCommon
Northern PikePresent
PanfishPresent
Smallmouth BassPresent

Boat Landings

1 landing

NameTypeRampTrailersFee
Public Boat LandingPublic

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
Curly-Leaf PondweedConfirmed
Eurasian Water-MilfoilConfirmed
Rusty CrayfishConfirmed

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

Mallalieu Lake — Facts & Figures | Stay Northern