Cast Gill

Little Lake Butte Des Morts

Winnebago County, Wisconsin · WBIC 129800

Official regulationsDNR lake map

The DNR has advice about eating fish from this water. How much is safe depends on the fish and on who is eating it. Look it up on the DNR site

The DNR lists this lake's watershed (Plum Creek-Fox River) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS

This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations

Size

1,306 acres

Max depth

18 ft

DNR lake type

Complex, Riverine

Water clarity

2.5 ft

Low, measured Sep 2025

A river-like water type, with flow instead of a still basin. This describes the lake type in general, not this lake in particular.

Outline

Fritse Park Boat Ramp1Ninth Street Boat Launch2

Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1984), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.

Water clarity

2.5 ft Secchi depthLow

Last measured Sep 9, 2025. 35 readings on record, 2000 to 2025.

Typical summer clarity (June to September): 2 ft, low, from 21 readings (2013 to 2025).

Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. Clear means a Secchi depth of 10 feet or more, moderate 5 to 10 feet, low under 5 feet.

Wisconsin DNR water monitoring (volunteer and staff), via the Water Quality Portal; station Little Lake Butte Des Morts - Site 1. Checked Oct 23, 2026.

Water temperature

Last measured Sep 9, 2025, too long ago to show as the current temperature.

A typical year Modeled estimate

  • Ice goes outabout Mar 31 (Mar 26 to Apr 10)
  • Surface reaches 48°Fabout Apr 14 (Apr 7 to Apr 23)
  • Surface reaches 64°Fabout May 23 (May 11 to May 25)
  • June surface73°F, usually 72 to 76°F
  • July surface80°F, usually 78 to 81°F
  • August surface76°F, usually 75 to 78°F

Mixes regularly through the summer instead of forming a warm top layer.

A computer model of this lake's typical weather and water, built from 15 years, 2005 to 2019. Ranges show the middle half of years. The model was not calibrated against measured temperatures for this lake. It is an estimate, not a measurement.

Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). Modeled: U.S. Geological Survey lake temperature data release (doi:10.5066/P9CA6XP8).

Today at the lake

Loading today's forecast…

Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.

Stocking history

  • Muskellungelast stocked 2024 (large fingerling); stocked in 2 years since 2010

Stocking shows what was added to the lake, not what is in it now.

Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.

Fish recorded near this lake

Recorded in open fish survey and museum records (GBIF). A record shows a fish was found near this lake in that year, not that it is there now, and says nothing about how many. Most coordinates are rounded to about 1 km, so a record is attached only when one lake is the clear match.

Open fish survey and museum records from GBIF; datasets are listed on the sources page. Checked Oct 23, 2026.

Boat landings

Wisconsin DNR public boat access sites. Checked Oct 23, 2026.

Water level and flow

Loading current readings…

U.S. Geological Survey gauges at or beside this lake. Readings are provisional and fetched when you open the page.

More lakes in Winnebago County

All Winnebago County lakes

Where this comes from

  • Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
  • OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
  • Stocking historyWisconsin DNR annual fish stocking summary, checked Oct 23, 2026
  • Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
  • Boat landingsWisconsin DNR public boat access sites, checked Oct 23, 2026
  • Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
  • Typical-year temperatureU.S. Geological Survey lake temperature model (modeled estimate), checked Oct 23, 2026
  • Fish recordedOpen fish survey and museum records, via GBIF, checked Oct 23, 2026
  • Water level and flowU.S. Geological Survey gauges (readings are live), checked Oct 23, 2026
  • Fish consumption advice flagWisconsin DNR advisory areas (flag and link only), checked Oct 24, 2026
  • VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026

See data sources for what each source covers, and about for how the numbers are matched to lakes.

Something wrong on this page? Report a problem.