Adventure| Location | Friday Harbor, Washington |
|---|---|
| Nightly rate (listed) | From $12/night |
| Book on | Washington State Parks |
From the park's listing on Washington State Parks. Confirm details with the park before you book.
This weekend · Sold out Oct 30 – Nov 1No site open for all your nights

Closest stays by type. Distances are straight-line from Posey Island Marine State Park, not driving.
Available Oct 30 – Nov 1 · 2 nights13 sites open for every night
Available Oct 30 – Nov 1 · 2 nights10 sites open for every night
Available Oct 30 – Nov 1 · 2 nights56 sites open for every nightPosey Island Marine State Park is a Washington State Parks campground in Posey Island. It lists 2 tent sites.
Checking 2 nights (your saved dates or this weekend). Tell us what you're staying in to see matching sites and prices.
Availability checked Oct 26 on Washington State Parks. Rates are the provider's nightly rates; totals are estimates before taxes & fees.
You book with the provider. Each row shows that provider's lowest open option for your dates, and which provider our main button uses.
Availability checked Oct 26 on Going to Camp.
| Site | Fr 30 | Sa 31 | Price |
|---|---|---|---|
| 2 | X | X | $12 |
| 1 | X | X | $12 |
✓ available · R reserved · X not available · C closed · W first come, first served · N not yet released
This weekend (Fri, Oct 30 – Sun, Nov 1): Book online. Reservations online on Washington State Parks — open dates and rates come from the booking site.
Posey Island Campground
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Posey Island Marine State Park is popular with kayak groups and porpoises, but, depending on the day, you may also have the place to yourself. Though Posey seems barren at first, a thorough perusal reveals meadow grasses, ancient Yew trees, bright orange lichen and wildflowers blooming in season. Photographers and painters have found endless creative opportunities here. The park is a 1-acre camping park with 1,000 feet of shoreline. 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.
| Agency / operator | Not listed |
|---|---|
| Booking | Online via washington.goingtocamp.com (booking listing; window not listed) |
| Max RV / trailer length | Not listed |
| Bear storage | Not listed |
| Season | Not listed |
| Hookups | Not listed |
"Not listed" means no source we use states it.
Official facts link to their source; “Listing” facts come from the washington.goingtocamp.com listing. Anything we can't source says so.
This listing doesn't publish RV length limits, so confirm your rig fits. Pickup area: Seattle (Seattle-Tacoma International (SEA)), about 90 mi straight-line from Posey Island Marine State Park. RV rentals in Seattle
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