Posey Island State Park
Also known as Posey Island Marine State Park
Notice: Burn Ban - Level 1 — details
- Status
- Open (per official listing)Daily 8 a.m. – sunset
- Entrance fee
- Statewide rule — see below
- Day-use reservations
- None mentioned
- Dogs
- Dogs allowed
- Camping
- Yes
- Official site
- parks.wa.gov(360) 378-2044
Official page last checked Oct 29, 2026. How we keep this current
Current alerts 1
Fire restriction Burn Ban - Level 1Fires allowed in all designated fire pits and grills. Propane and gas grills allowed.
Posted by the park. Official alert
Overview
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Covering about 1 acres, Posey Island State Park lies in San Juan County, about 9 miles northwest of Friday Harbor.
Popular activities here are canoeing and kayaking, boating, swimming, wildlife watching, and fishing. Facilities for water recreation include a swimming beach. Overnight options include campsites, with tent sites.
Hours
Park, gate, office and facility hours are listed separately because they often differ. Alerts above override normal hours.
| Facility | Days | Hours | Season |
|---|---|---|---|
| Park | Daily | 8 a.m. – sunset | — |
Official wording
8 a.m. - Dusk year round
Source: official park page, checked Oct 29, 2026. Times are local to the park (America/Los Angeles).
Fees and passes
Per vehicle: Discover Pass required for day-use parking; not required for registered campers in the park they are staying in. Extra fees for watercraft launch ($7/day), trailer dump ($5), moorage.
Statewide fee rule from Washington's park system; this park’s page doesn’t list its own fees.
Washington park passes
- Discover Pass (annual) — $45. Day-use vehicle access to state parks (and DNR/WDFW lands) Details
- Discover Pass (one-day) — $10. Day-use vehicle access for one day Details
From the Washington state guide. Confirm which passes this park accepts.
Reservations
- Day use
- No day-use reservation requirement mentioned
- Booking system
- Camis (washington.goingtocamp.com)
- Phone
- (888) 226-7688
We link to the official booking system rather than showing live availability, which changes minute to minute.
Pets
Dogs allowed
Dogs Allowed on Leash • Dogs Allowed on Leash
Service animals are generally permitted where pets are not. Check with the park for specific areas.
Camping
Camping
All camping is reserved for users arriving by human powered vessel or wind powered watercraft and are part of the Cascadia Marine Trail (PDF).
The two primitive campsites can be reserved May 15 - Sept. 30. They are first-come, first-served the rest of the year and on nights when they have not been reserved.
Friday - Saturday nights are limited to one site and one night per reservation. Reservations are limited to a total of five Friday or Saturday one-night reservations per month.
Sunday - Thursday nights are limited to one site and a maximum of two nights per reservation. Reservations are limited to a total of six one- or two- night reservations per month.
From the official park page, checked Oct 29, 2026. Site counts and prices can change; confirm when booking.
Things to do
Wildlife viewing and birdingBoatingCampingFishingHikingCanoeing and kayakingSwimmingPicnicking
Boating and paddling
Kayaking
Kayaking is one of the best ways to enjoy Posey Island. Paddle around Spieden Island and watch antelope and long-horned sheep grazing in the meadows. Keep an eye out for orca whales, seals and porpoises that are often spotted in these waters. Posey Island is a popular stop for commercial kayak tours and can get busy in the summer.
Amenities
Facilities
- Restrooms
- Picnic areas
Water
- Swimming beach
Camping
- Tent camping
✓ listed by the park · ✕ the park says it is not available. Anything not shown here isn’t mentioned by the official source — that means unknown, not unavailable.
Rules and permits
- Dogs Allowed on Leash
- Boat-in Only
All Posey Marine State Park campsites are part of the Cascadia Marine Trail and are only reservable by those arriving by human-powered vessel. Those visiting by motor boats are limited to day-use only.
There are no garbage services on the island, practice Leave No Trace principles. Read our blog to learn more about the LNT principles.
Getting there
- Address
- Pearl Island
Friday Harbor, WA 98250 - Nearest town
- Friday Harbor — about 9 mi northwest (straight line)
- Coordinates
- 48.6183, -123.1680
- Phone
- (360) 378-2044
- limekiln@parks.wa.gov
Nearby state parks
Sources and freshness
- Washington State Parks — park page — last checked Oct 29, 2026
- Washington State Parks Find Parks directory (paged Drupal view), joined to WSPRC ParkBoundaries ArcGIS layer for coordinates/category
- Wikidata
- USGS PAD-US 4.1 (boundary and acreage)
- Photo: Posey Campsite (20472785714).jpg — Public domain (US federal government work), Bureau of Land Management Oregon and Washington
“Last checked” is when our system last read the official source. No change has been detected since this page was first published. Hours, fees and rules can change without notice — confirm with the park before you go. Methodology