Halfmoon Lake

Oconto County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)28
Maximum Depth (ft)38
Mean Depth (ft)11
Shoreline (miles)—
Bottom Composition30% sand, 0% gravel, 0% rock, 70% muck
Water Clarity — Secchi Depth (ft)—
Trophic Status—
Drainage BasinSEEPAGE
Lake Classlake
Public Access—
Township—
GPS Coordinates45.18590° N, 88.20230° W
WBIC (DNR ID)421800

Fish Species

2 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Largemouth BassCommon—
PanfishCommon—

Boat Landings

1 landing

NameTypeRampTrailersFee♿
Halfmoon Lake AccessRAMP—1-5NoNo

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
Banded Mystery SnailConfirmed—
Chinese Mystery SnailConfirmed—
Phragmites (non-native)Confirmed—

Data sourced from Wisconsin DNR lake surveys. Last scraped: 4/30/2026.