WI · ranked by public data

Clearest Lakes in Rock County, Wisconsin, Ranked

1 Rock County lake are at least 50 acres with a current DNR water-clarity reading, out of 15 documented lakes in the county. Updated July 2026.

11.5 ft
77 acres
Rock County, WI
Clear Lake
enhancedDepth mapDNR impairmentWater data
42.80, -88.9877 acres | 12 ft max1 public access pointPanfish, Largemouth Bass
1.5 ft water clarity (Jul 2025) · 77 acres, 12 ft max depth · 1 public landing · DNR impairment listed

Methodology

How this list is built

Ranked by the most recent documented Secchi disk reading (feet of visibility) from DNR/CLMN monitoring.
Readings older than 10 years are excluded — a decades-old reading no longer says anything about today's water.
Lakes under 50 acres — or without documented acreage — are excluded from rankings.
Readings deeper than the lake's own documented maximum depth are treated as source-data errors and excluded.
Clarity swings with season and weather, so the reading date is shown for every lake.
Only monitored lakes can rank. A clear lake nobody measures cannot appear here — this list rewards documentation as much as clarity.

FAQ

Rock County lake records

What is the clearest lake in Rock County?

Clear Lake — By most recent Secchi reading, Clear Lake in Rock County is the clearest monitored lake in Rock County, with 1.5 feet of visibility.

Clearest lakes statewide Deepest lakes in Rock County Biggest lakes in Rock County Lakes with the most public access in Rock County All Rock County lakes

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.