The Sheboygan River Basin includes most of Sheboygan County, along with northeast Ozaukee County, northeast Fond du Lac County, and parts of southern Manitowoc County. Approximately 615 square miles, the basin topography varies from flat moraine landscapes to low rounded hills interrupted by narrow valleys. Visited by many, recreation within this network of rivers is high year round. Because of this an interactive river basin map has been created to help people learn and access the basin. There is a good diversity of sport fish, especially in the low reaches of this basin. Find out more.