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Posey Island State Park, Friday Harbor, WA

Photo: Bureau of Land Management Oregon and Washington, Public domain, via Wikimedia Commons. Cropped and resized.

Sports & Outdoors

Posey Island State Park

A one-acre marine state park on a small island near Roche Harbor, reached only by boat, with two primitive campsites.

Pearl Island, Friday Harbor, WA 98250 · Friday Harbor, WA

About Posey Island State Park

Posey Island is a small marine park in San Juan County, Washington, sitting just north of Pearl Island close to Roche Harbor. Its roughly one acre holds two primitive campsites that suit paddlers on multi-day trips. Visitors arrive by non-motorized or wind-powered craft for camping, while motorboat visitors are limited to day use. The island has no drinking water, no garbage service, and one composting toilet, so guests should pack out everything. Kayakers often paddle around nearby Spieden Island to see wildlife such as antelope, sheep, and orcas, and the site can be busy in summer.

  • #marine park
  • #island
  • #kayaking
  • #camping
  • #boat-in only

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