Jones Island Marine State Park
October 2026
About
Among the most enchanting of the San Juan Islands, Jones Island Marine State Park is the place to let your heart and feet wander. Your wheels can wander too, as the paved trail through the park’s interior meets ADA standards. Accessible only by boat, the park is 188 acres with 25,000 feet of saltwater shoreline on the San Juan channel. The park provides mooring buoys on two coves, a dock, a Cascadia Marine Trail campsite and 24 first come first served primitive campsites. Drinking water is available May through September. The park has six composting toilets. There is no garbage service to the park. Visitors must pack-out what they pack-in.
Is Jones Island Marine State Park fully booked?
A campground showing no availability is almost never full for good. People cancel — plans change, weather turns, someone books three weekends and keeps one — and the site goes straight back into the booking system, usually without warning and often at odd hours. The reason sold-out campgrounds feel impossible is not that sites never free up; it is that nobody is watching at the moment they do.
CampHawk watches Jones Island Marine State Park in Jones Island, WA for you. We recheck it every 15 seconds, around the clock, and the moment a site opens we send a text, an email and a push notification, with a link straight to the booking page.
Searching is free and needs no account — the calendar above is live right now. Watching Jones Island Marine State Park for cancellations is the paid part.