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.
Reservations are required. Reservations are available up to nine months in advance of travel. It’s popular and reservations go quickly so although two weeks is the minimum, and that may affectively make it impossible if people can’t plan further ahead than that.
Don’t go expecting solitude!
Roche Harbor has allowed us to put in a launch-and-land side at the south side of the resort. Overnight parking fees apply.
The two designated Cascadia Marine Trail campsites are close together and not far from the composting toilet.
Location: Posey Island is off the northwest corner of San Juan Island about a mile from Roche Harbor.
Sites: 2 sites. Only stay in 1 of the 2 group areas; max of 16 allowed on island per night. This is enforced.
Sanitation: Composting vault toilet
Fires: Fire rings available
Extras: 2 picnic tables
Fees: See washington.goingtocamp.com
Special Considerations: Sites must be reserved in advance at washington.goingtocamp.com. Reservations are available up to nine months in advance of travel. It’s popular and reservations go quickly so although two weeks is the minimum, and that may affectively make it impossible if people can’t plan further ahead than that. Any unreserved spots are then available on a first-come, first-served basis.
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: 16
Max Nights: 3
Reservations: 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.