Rock Lake is a 1,365 acre lake located in Jefferson County. It has a maximum depth of 60 feet. Visitors have access to the lake from several public boat landings. There are also 2 public beaches on the lake. Fish include largemouth bass, smallmouth bass, northern pike, walleye and panfish. The water is moderately clear. According to the DNR, largemouth bass, smallmouth bass, walleye and panfish are common in the lake while northern pike are listed as present.