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♿
Grand Rapids Flowage AccessRAMP—16-20NoNo

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: 4/30/2026.

Grand Rapids Flowage — Facts & Figures | Stay Northern