Petenwell County Park, the 2nd largest county park in Wisconsin, is open year-round and situated on Lake Petenwell, the 2nd largest body of water in Wisconsin. This 160 acre park is on a beautiful lake, and includes a game room, designated swimming area, boat launch, playground equipment and hiking trails, Harbor of Refuge with slips for transient use, heated shower/restroom facility, visitor/registration station with concession/game room, and paved parking lots with more space. Firewood is available. Additional campsites have been added, most with electricity.

Online reservations are here!

This website is now live. So that all customers can be notified and can become familiar with it, we are not accepting reservations until;

Accepting seasonal boat slip reservations January 22 at noon or 12pm

Accepting seasonal/yearly campsite reservations January 23 at noon or 12pm

Accepting daily, weekly campsite, boat slip & shelter reservations January 24 at noon or 12pm

Until we are accepting reservations you may create customer accounts, yearly campers have had an account created and you will receive an email with your username & password. If you have any questions please contact the parks directly.

Petenwell Park (608) 564-7513

Castle Rock Park (608) 339-7713

For Petenwell Park fees click here.

Petenwell Park is a designated snowmobile unload/load area.

Petenwell Park Map of Campsites

August 16,2019 - All County Beaches are OPENED and being monitored.

We would like to clarify some misinformation that is being circulated. The beaches at Petenwell, Castle Rock, and Arrowhead Lakes are NOT closed related to Blue-Green Algae. The report that is being circulated in recent days is from last year. For current information always be sure to check this page as well as the Adams County Health Department Website.