Jones Island Marine State Park sits in the San Juan Channel near the Wasp Islands, accessible only by boat. The park has 11 primitive tent sites, including two Cascadia Marine Trail sites on the quieter west shore. Sites cost $12 per night. Potable water runs mid-May through mid-September; outside that window, you pack your own.
Primarily primitive tent and boat-access campsites, including designated Cascadia Marine Trail (human-powered) sites; no developed RV or cabin lodging.
Weather and SeasonsSummer delivers the most reliable conditions. Mid-May through mid-September brings on-island water service and temperatures typically in the mid-50s to upper-60s°F. July and August see the heaviest boat traffic and weekend crowds. Shoulder-season visitors find quieter moorage and campsites but must carry all their water. Misty mornings and cool maritime breezes are common even in summer, so layers help.
Natural Features and SceneryThe island has 25,000 feet of rocky shoreline and a forested interior of Douglas-fir and cedar. A loop trail winds through the woods and along the western shore, passing pocket beaches, bluffs, and madrone trees. Tide pools appear at low water. Harbor seals, porpoises, and seabirds are common. Black-tailed deer are habituated and will walk right through camp. The west- and south-facing shores offer open water views and dramatic sunsets across the Salish Sea.
Geological RegionSan Juan Islands (San Juan Channel near the Wasp Islands)
Scenic ViewsOutstanding water and sunset views toward Orcas Island and outer islands from west- and south-facing waterfront sites; western and southern shoreline sites are frequently recommended for privacy and dramatic sunsets.