Lake Winnebago is a 131,939-acre lake located in Fond du Lac, Calumet, and Winnebago counties. The structure of Lake Winnebago is quite unusual. Although it covers 220 square miles, it is quite shallow. At its deepest, the lake drops to a mere 21 feet. Walleye flourish in the Lake Winnebago system. Perch fishing is also outstanding. But you can’t forget about the sturgeon! The lake sturgeon population here is rated as one of the finest in the country. Lake Winnebago is a haven for boating, fishing, waterskiing, stand-up paddleboarding, and windsurfing. In the winter, Lake Winnebago turns into a mini city on the ice during the sturgeon spearing season and also becomes a great place for ice fishing, snowmobiling, and ice kiting.