Lake Koshkonong is one of the largest inland lakes in Wisconsin, located primarily in Rock County in the southern part of the state. This expansive 10,595-acre drainage lake offers diverse fishing opportunities for anglers of all skill levels. With a maximum depth of only 7 feet, Lake Koshkonong maintains a reputation as a productive fishery with numerous species and various fishing methods available throughout the year. The lake's shallow nature makes it particularly effective for certain types of fishing while requiring special consideration during different seasons.