Grand Rapids Flowage

Marinette County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)307
Maximum Depth (ft)21
Mean Depth (ft)6
Shoreline (miles)
Bottom Composition85% sand, 0% gravel, 0% rock, 15% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinDRAINAGE
Lake Classflowage
Public Access
Township
GPS Coordinates45.37120° N, 87.66110° W
WBIC (DNR ID)610700

Fish Species

5 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Northern PikeCommon
PanfishCommon
Smallmouth BassCommon
Largemouth BassPresent
WalleyePresent

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
Spiny WaterfleaConfirmed

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