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.

A Discover Pass is required for vehicle access to Washington state parks for day use. For more information about the Discover Pass and exemptions, please visit the Discover Pass web page.

Camping Fees : Please note that the following general fee information is not customized for each individual park, so not all fees will apply to all parks (for example, primitive campsite and dump station fees listed apply only to parks that have primitive campsites and dump stations). An additional $1 per night is added to the basic camping fees listed below at this high-use park. Basic camping fees are:

Standard campsite, $15.

Utility campsite, $21.

Primitive campsite (accessible by motorized/non-motorized vehicles) and for water trail camping, $10

An additional $3 fee (standard) or $5 fee (utility) may be charged for select premium campsites at some parks.

Maximum eight people per campsite.

Second vehicle: $10 per night is charged for a second vehicle unless it is towed by a recreational vehicle. Extra vehicles must be parked in designated campsite or extra vehicle parking spaces.

Dump stations (if available): Year-round dump station fees are $5 per use. If you are camping, this fee is included in your campsite fee.

More about park hours : Check-in time is 2:30 p.m., and check-out time is 1 p.m.Quiet hours are from 10 p.m. to 6:30 a.m. Length of stay: you may stay up to ten consecutive days in any one park during the summer; the stay limit is extended to 20 days between Oct. 1 and March 31.

Campsite Information : The park has 61 tent spaces, 60 utility spaces, one dump station, four restrooms (two ADA) and four showers (two ADA).

Any camping unit tent or RV may use either site type. However, any unit camped in a hookup site must pay the hookup-site fee. Maximum site length is 50 feet (may have limited availability).

There is no camping next to the reservoir.

To reserve a campsite, call (888) CAMPOUT or (888) 226-7688.

Group Accommodations : The park provides a group camp that accommodates up to 50 people. It is located near the tent camp area. The group camp has a grassy section and is well-shaded. Restroom facilities are nearby. There is a year-round creek adjacent to the group camp that provides excellent trout and bass fishing. Fees vary with size of the group. To reserve, call (888) CAMPOUT or (888) 226-7688.