Posey Island State Park

This entire one-acre island is a designated Cascadia Marine Trail campsite and is a great site for watching the sunset. It is also a popular stop for lunch with tour groups. Don’t go expecting solitude! The two designated Cascadia Marine Trail campsites are close together and not far from the composting toilet.

Spit at south end of island
Spit at south end of island
Approach: South sandy spit size varies with tides and is best access to the island.
Location: Posey Island is off the NW corner of San Juan Island about a mile from Roche Harbor.
Hazards:
Sites: 2 sites. Only stay in 1 of the 2 group areas; max of 16 allowed on island per night. This is enforced.
Water: None
Sanitation: Composting vault toilet
Overflow: None
Fires: Fire rings available
Extras: 2 picnic tables
Fees: Reserve online
Special Considerations: Sites must be reserved two weeks in advance at washington.goingtocamp.com. Any unreserved spots are then available on a first-come, first-served basis. Maximum of three consecutive nights camping.
Natural History: Posey Island is flat and sandy, covered with beach grass, brush and a few small scrubby trees, making for a picturesque beach scene. During the summer, the island can be covered with wildflowers. Historically, the spot was a destination for people wanting to picnic and pick bouquets, or "posies." The island was originally thought to be a part of Pearl Island, and was called Spit Point. Local people, however, knowing better, called it Posey Island. The name stuck and has now been adopted for wider use.
Max People:
Max Nights: 1
Reservations: No
Latitude: 48.61815
Longitude: -123.167816
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