The Rock-Koshkonong Lake District is the largest lake district in the State of Wisconsin, spanning three counties - Rock, Dane and Jefferson. Formed in 1999 to better manage the resources of the Rock River and Lake Koshkonong, the Rock-Koshkonong Lake District boundary starts at the Indianford Dam on the Rock River, includes Lake Koshkonong and continues north to the Jefferson city limits.

Our Mission

Our mission is to protect, preserve and improve the natural resources of Lake Koshkonong and the Rock River for an eqaul balance of wildlife, habitat and recreation.

Lake District Maps - Full Color | B+W (No Reference)