One acre of land in the San Juan Islands, Posey Island hosts just two group campsites and requires boat-in access, specifically human-powered or wind-powered craft. The island has no tap water despite being surrounded by it, so campers must arrive fully supplied. A vault toilet is on-site, along with picnic tables, and campfires are permitted, though gathering driftwood may require paddling to a neighboring island. Reservations are required. At $12 a night, this is a good match for kayakers and paddlers already exploring camping near Posey Island who want a designated overnight stop rather than a dispersed site. Harbor seals and bald eagles have been spotted in the area. Lakedale Resort provides a land-based alternative for groups needing more infrastructure.
Description
An itty-bitty island hides in plain sight, between Pearl Island and Roche Harbor in the San Juan archipelago.
Posey Island has two group campsites, each with a sweeping view. Grill up a hearty meal, sit back for a big-sky cloud show or a glorious sunset and enjoy a rare opportunity to do nothing but rest.
Posey Island Marine State Park is a 1-acre marine camping park with 1,000 feet of shoreline. It is located a quarter mile north of Pearl Island, near Roche Harbor, San Juan Island. Posey Island is part of the Cascadia Marine Trail. There is no potable water on the island, and visitors must pack out what they pack in. Camping reservations are required for both campsites, which are for the exclusive use of boaters arriving by human- or wind-powered watercraft.
All campsites are for the exclusive use of boaters arriving by human or wind-powered watercraft. Each campsite can accommodate a maximum of eight campers. This maximum number of campers is strictly enforced due to the small size of the island. No exception. Paddlers and sailors must be prepared to seek other campsites if the campsites are at capacity.
Reservation Info
Reservations for Friday or Saturday nights May 15-September 30 are limited to one site and one night per reservation. Reservations are also limited to a total of any five Friday and /or Saturday one-night reservations per month.
Reservations for Sunday - Thursday nights May 15-September 30 are limited to one site and a maximum of two nights per reservation. Reservations are also limited to a total of six one- or two-night weekday reservations per month.
Campsites are available on a first-come, first-served basis May 15-September 30 on nights when they have not been reserved. No reservations are needed October 1- May 14.
RV Road Trip Guides
Map & DirectionsPosey Island State Park Campground is located in Washington near Friday Harbor
Directions
Posey is located a quarter mile north of Pearl Island, near Roche Harbor, San Juan Island.
Address
Posey Island Campground
Posey Island, WA 98028
Coordinates
48.61875 N
123.1681 W
Connectivity
T-Mobile5GExcellent Coverage
VerizonLTESome Coverage- AT&T5GExcellent Coverage
Connectivity
- T-Mobile5GExcellent Coverage
- VerizonLTESome Coverage
- AT&T5GExcellent Coverage
Access
- Boat-InSites accessible by watercraft.
Site Types
- Tent Sites
- Standard (Tent/RV)
- Group
Features
For Campers
- Picnic Table
- Reservable
- Drinking Water
- Toilets
- Pets
- Fires
Drive Time
- 1 hr 36 min from Mount Vernon, WA
- 1 hr 54 min from Bellingham, WA
- 2 hrs 31 min from Seattle, WA
- 3 hrs 28 min from Bremerton, WA
