Townline Reservoir*

Marathon, Portage County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)395
Maximum Depth (ft)10
Mean Depth (ft)
Shoreline (miles)
Bottom Composition60% sand, 0% gravel, 0% rock, 40% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinDRAINED
Lake Classflowage
Public Access
Township
GPS Coordinates44.69170° N, 89.81610° W
WBIC (DNR ID)1414800

Fish Species

1 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Northern PikePresent

Boat Landings

No boat landing data available.

Invasive Species

No invasive species currently documented for this lake.

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

Townline Reservoir* — Facts & Figures | Stay Northern