State Park · Washington, United States
Posey Island Marine State Park
Posey Island Marine State Park is a state park in Washington, United States.

Photo: Bureau of Land Management Oregon and Washington from Portland, America via Wikimedia Commons, Public domain. Cropped and resized for display.
Park facts
| Park type | State Park |
|---|---|
| Location | San Juan, Washington, United States |
| Coordinates | 48.6184° N, 123.1677° W |
| Managed by | Washington state park system |
Every fact above is taken from the sources listed below; anything no source states is left blank rather than guessed.
About Posey Island Marine State Park
Posey Island State Park is a 1-acre (0.40 ha) public recreation area encompassing Posey Island in San Juan County, Washington, United States. The island is located .25 miles (0.40 km) north of Pearl Island, near Roche Harbor, San Juan Island, and has about 1,000 feet (300 m) of saltwater shoreline on Spieden Channel. The park's two campsites are part of the Cascadia Marine Trail and are restricted to visitors arriving in non-motorized watercraft. The island-park is managed by the Washington State Parks and Recreation Commission. It became a state park in 1960 under lease from the U.S. Bureau of Land Management.
Description from the park's Wikipedia article (CC BY-SA), linked in the sources below.
Planning your visit
What to do
Getting there
| Nearest town | Pearl Island, Washington |
|---|---|
| Getting there | about 25 miles north of Pearl Island |
Where to stay
| Campgrounds | Yes |
|---|
Famous trails
- Cascadia Marine Trail
Airports near this park
The airports a visitor would actually fly into, nearest first — each link opens its profile on our sister site AirportProfiles.
- Victoria International Airport (YYJ) · Victoria, Canada · 12.0 miles away
- Vancouver International Airport (YVR) · Vancouver, Canada · 39.8 miles away
- Seattle–Tacoma International Airport (SEA) · Seattle, United States · 90.1 miles away
Parks nearby
More parks in Washington
Frequently asked questions
Where is Posey Island Marine State Park?
Posey Island Marine State Park is in Washington, United States (48.6184° N, 123.1677° W).
Does Posey Island Marine State Park have campgrounds?
Yes — Posey Island Marine State Park has campgrounds.
How do I get to Posey Island Marine State Park?
The nearest town is Pearl Island, Washington. about 25 miles north of Pearl Island.
Sources
- https://en.wikipedia.org/wiki/List_of_Washington_state_parks — Wikipedia list of Washington state parks — park name, county/location, size, year where the table states them.
- https://en.wikipedia.org/wiki/Posey_Island_State_Park — Wikipedia article — description (CC BY-SA).








