Kettle Moraine State Park does require a vehicle pass for entrance, and the cost varies depending on the vehicle and the length of time. Quick visitors can pay by the hour or pay a flat fee for the entire day. Annual passes are available for Wisconsin state parks.
The state park does offer some free and discounted rates on special weekends, for veterans and school organizations. In addition to admission fees, a small hiking fee applies to all visitors over the age of 16. Camping is available at Kettle Moraine for additional fees. Fishing and hunting in all Wisconsin state parks require current licensing.