Biron Flowage

Portage, Wood County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)2,187
Maximum Depth (ft)23
Mean Depth (ft)
Shoreline (miles)
Bottom Composition60% sand, 30% gravel, 5% rock, 5% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinDRAINAGE
Lake Classflowage
Public Access
Township
GPS Coordinates44.44870° N, 89.70630° W
WBIC (DNR ID)1396900

Fish Species

8 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Smallmouth BassCommon
WalleyeCommon
CatfishPresent
Largemouth BassPresent
MuskyPresent
Northern PikePresent
PanfishPresent
SturgeonPresent

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
Eurasian Water-MilfoilConfirmed
Yellow IrisConfirmed

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