Potholes State Park is a 640-acre camping park with 6,000 feet of freshwater Shoreline
on Potholes Reservoir (also known as O'Sullivan Reservoir). Potholes Reservoir is often confused with the Pothole Lakes themselves, which are a 30- to 45-minute drive from the park. The terrain is desert with freshwater marshes.The park has 61 tent spaces, 60 utility spaces, five cabins, one dump station.
Potholes State Park is situated on the reservoir created by construction of O'Sullivan Dam rather than the nearby "potholes geologic formations" for which it is named. Thousands are attracted to the Potholes desert area each year to enjoy fishing, hunting, bird watching, water sports and the sunshine. This desert area is unique because of its abundance of water. The area is comprised of sand dunes, rocky canyons and dozens of lakes. The Columbia Wildlife Refuge two miles east of the park is a favorite for wildlife viewing and bird watching.