Cast Gill

Leigh Flowage

Oconto County, Wisconsin · WBIC 519500

Official regulationsDNR lake mapDepth map (PDF)

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

Size

231 acres

Max depth

52 ft

DNR lake type

Simple, Warm, clear water color

Water clarity

17 ft

Clear, measured Oct 2017

A warm-water lake type: the DNR groups it with lakes that warm up through summer. This describes the lake type in general, not this lake in particular.

Outline

Leigh Flowage Access (Ed Tank Boat Landing)1

Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1973), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.

Water clarity

17 ft Secchi depthClearOlder reading

Last measured Oct 2, 2017. 30 readings on record, 2001 to 2017.

Typical summer clarity (June to September): 19.2 ft, clear, from 10 readings (2015 to 2017).

Nothing has been measured in the last 5 years, so this may not match the lake today.

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 LEIGH FLOWAGE - MARL BAY DEEP SPOT. Checked Oct 23, 2026.

Water temperature

A typical year Modeled estimate

  • Ice goes outabout Apr 9 (Mar 31 to Apr 20)
  • Surface reaches 48°Fabout Apr 23 (Apr 18 to May 4)
  • Surface reaches 64°Fabout May 21 (May 10 to May 25)
  • June surface73°F, usually 71 to 74°F
  • July surface78°F, usually 77 to 79°F
  • August surface75°F, usually 73 to 77°F

Forms a warm top layer around Apr 26, lasting about 176 days.

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.

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

  • Black Crappielast stocked 2024 (adult, large fingerling and yearling); stocked in 5 years since 2010
  • Walleyelast stocked 2023 (large fingerling and small fingerling); stocked in 13 years since 2010
  • Yellow Perchlast stocked 2022 (adult and large fingerling); stocked in 3 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.

Boat landings

Some landings are matched to this lake by name only, because the DNR list gives no location for them. They have no pin.

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

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More lakes in Oconto County

All Oconto 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
  • VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
  • Depth map linkWisconsin DNR lake maps list, checked Oct 24, 2026

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

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