Lake Wisconsin is a 7,197 acre lake located in Sauk, Columbia Counties. It has a maximum depth of 24 feet. Visitors have access to the lake from a bunch of public boat landings. Fish include walleye, sauger, largemouth bass, smallmouth bass, northern pike, catfish, trout and panfish. According to the DNR, largemouth bass, smallmouth bass, northern pike and walleye are common in the lake.