WI · ranked by public data
5 Fond du Lac County lakes are at least 50 acres with a current DNR water-clarity reading, out of 33 documented lakes in the county. Updated July 2026.
Fond du Lac County, WI
11 ft water clarity (Aug 2025) · 51 acres, 32 ft max depth · 1 public landing
Fond du Lac County, WI
10.5 ft water clarity (Jun 2026) · 209 acres, 30 ft max depth · No verified public access
Fond du Lac County, WI
7 ft water clarity (Oct 2023) · 75 acres, 47 ft max depth · 1 public landing
Fond du Lac County, WI
6 ft water clarity (Jul 2025) · 90 acres, 29 ft max depth · 1 public landing
Fond du Lac County, WI
6 ft water clarity (Sep 2020) · 70 acres, 23 ft max depth · 1 public landing · DNR impairment listed
Methodology
FAQ
Forest Lake — By most recent Secchi reading, Forest Lake in Fond du Lac County is the clearest monitored lake in Fond du Lac County, with 11 feet of visibility.
Source data: Wisconsin DNR lake and monitoring records as aggregated by LakeList. Figures reflect the most recent documented values, not new surveys — verify access and rules before you go. Lake outlines are shoreline shapes from LakeList and the USGS National Hydrography Dataset; they illustrate a lake's form and are not depth or navigation charts.