Potholes State Park

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.
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  1. Activities
  2. Boating
  3. Camping
  4. History
  5. Maps

ADA Amenities/Facilities

  • Campground
  • Restroom

Picnic & Day-Use Facilities

The park provides three picnic shelters with four tables each, plus 73 unsheltered picnic tables in a lawned, well-shaded area. All day-use facilities are first come, first served. Restrooms are available in the day-use area, located on the banks of the reservoir.



  • 3 miles of hiking trails

Water Activities & Features

  • 60 feet of dock
  • Boating
  • Four boat ramps
  • Freshwater fishing
  • Personal watercraft
  • Swimming
  • Water skiing
  • White-water kayaking

Other Activities & Features

  • Bird watching
  • Two volleyball fields
  • Horseshoe pit
  • Wildlife viewing

Additional Information

  • Volleyball players must bring their own equipment.
  • A recreational license is required for fishing and shellfish harvesting at Washington state parks. For regulations, fishing season information, or to purchase a recreational license, visit the Washington Department of Fish and Wildlife.