Posey Island Marine State Park

This State park, Tourist attraction guide around Washington lists Posey Island Marine State Park as one of the State park, Tourist attraction options in the Washington - USA area worth considering. Posey Island Marine State Park is a USA featured on CityPlaceList, a directory that gathers verified place data in one place. You will find it at Posey Island Marine State Park, Friday Harbor, WA 98250, United States, an address that is easy to plug into any navigation app. Visitors give it a 4.9 out of 5 across 15 reviews, a signal worth reading alongside the details below. The surrounding WA 98250 area adds more options if this spot turns out to be busy.

Everything on this page is compiled automatically from the source data and was last refreshed on Sep 25, 2026; nothing unverifiable has been added. As with any plan, confirm opening hours and prices directly with Posey Island Marine State Park before heading out.

To broaden your itinerary across Washington, consider stopping by A Loop of Cape Disappointment State Park, Fort Casey State Park and Kanaskat-Palmer State Park to expand your visit ideas; compare key features directly in the table on Explore Washington State Parks: Best Scenic Destinations.