Lake Winnebago (Winnebago, Fond du Lac, Calumet County)
Waterbody ID (WBIC): 131100 — permanent page /lakes/131100/.
Lake Winnebago is in Winnebago, Fond du Lac, Calumet County; records show 131,939 acres and 19 DNR access-site records.
- Size
- 131,939 acres
- Lake type
- DRAINAGE
- Max depth
- 21 ft
- 19 documented public access site records (DNR access inventory)
- 8 fish species/groups with abundance categories (DNR lake page)
- Summer Secchi clarity median 3 ft (field measurements)
- Official DNR depth map available (PDF)
Back to results Show on map Choose access / Directions Depth map (PDF) Check current DNR regulations
Plan your visit
- Lake directory: public landing — Yes
- Lake directory: public beach — Yes
- Lake directory: public park — Yes
- DNR public-access inventory: 19 documented access site records
- DNR public-access inventory: documented developed boat ramp
- DNR public-access inventory: documented carry-in access
- 19 sites qualify for per-site Directions through the reviewed lake association (load the site details below)
Each statement is bounded to its named source; absence of a record is never evidence of no access. The DNR access database may lag reality; posted signs at the landing are authoritative.
Verify at the DNR public boat access program page.
Documented public access sites — load details
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Fishing
The DNR lake page publishes 8 fish species/groups with abundance categories — categories are source labels, never a population count.
DNR fish labels: Catfish—Abundant; Panfish—Abundant; Sturgeon—Abundant; not population counts.
No fisheries survey population estimate is published for this lake in the covered report families.
- Musky reproductive status (DNR mapped): Self-sustaining via natural reproduction (Cat. 1)
Fishing limits — 2026-2027 season: 20 normalized rows across 20 species entries. Normalized from the DNR ruleset retrieved 2026-08-04. Source text remains authoritative.
Fish species and abundance detail — load details
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2026-2027 retained fishing rules: 20 published rows for 20 species; effective through 2027-03-07. Check current DNR rules.
Normalized fishing-regulation rows — load details
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Water and setting
- Field-measured summer Secchi clarity: median 3 ft from 299 samples, latest sample 2025-08-31
- Satellite clarity estimate: 3.39 ft (2016) — a remote-sensing estimate, kept separate from field measurements
- Lake directory clarity class: Low
Official DNR depth map (PDF) — Historical lake map; not for navigation. Link checked 2026-07-16.
Not published in the lake directory: official mean depth.
- AIS record: Asian clam — Verified, latest documented 2012-11-07
- AIS record: Banded mystery snail — Verified (vouchered), latest documented 2014-06-01
- AIS record: Chinese mystery snail — Verified, latest documented 2015-07-28
- AIS record: Curly-leaf pondweed — Verified (vouchered), latest documented 2006-07-11
- AIS record: Eurasian watermilfoil — Verified (vouchered), latest documented 1992-10-01
- AIS record: Faucet snail — Verified, latest documented 2023-10-25
- AIS record: Flowering rush — Verified, latest documented 2010-06-23
- AIS record: Hybrid Eurasian / northern watermilfoil — Verified, latest documented 2017-08-24
- AIS record: Phragmites (non-native ecotype) — Verified, latest documented 2018-09-11
- AIS record: Purple loosestrife — Verified, latest documented 2017-08-05
- AIS record: Rusty crayfish — Verified, latest documented 2014-06-02
- AIS record: Spiny water flea — Verified, latest documented 2022-07-26
- AIS record: Zebra mussel — Verified, latest documented 1999-01-01
Occurrence records come from a non-exhaustive DNR inventory; a record documents presence at observation time and a missing record is never evidence of absence.
- Public-land proximity (GIS proxy, not access evidence): mapped public land within 1,000 ft; nearest: Jaegers Island Wildlife Area (Wisconsin DNR); ≈9.8% of shoreline buffer
- Shoreline development (landcover proxy, 2025 source): ≈55.7% developed land within 300 m, ≈18.1% impervious
- Road proximity (TIGER proxy, 2025 source): nearest secondary road (U.S., state, or county highway) ≈0 m; ≈5.3 km of road per km² within 1 km
- Priority Navigable Waterway — basis: musky area
Designations are legally defined DNR records shown as their sources state them; no composite rating is implied.
Measured and satellite clarity records — load details
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Aquatic invasive species records — load details
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Data & sources
Published data families
- Fish species and abundance (DNR lake pages)
- Fishing regulations (normalized snapshot)
- Directory access facts (landing, beach, park)
- Public access site inventory
- Satellite water clarity estimate
- Field-measured Secchi clarity
- Aquatic invasive species occurrences
Original records: Wisconsin DNR lake page.
Missing values are unpublished, never zero; each fact above is bounded to its named source and date. Full sourcing detail: Data & methods.