Mystery Bay State Park

Mystery Bay State Park is a nature reserve on Marrowstone Island with direct waterfront access. The park includes boat docks, a launch ramp, mooring buoys, restrooms, and drinking water for visitors.

The bay received its name in the 1920s when waters between the islands served as smuggling routes during Prohibition. This era shaped how the place is remembered today.

Wooden sailboats moored year-round at the docks shape how the place looks and feels. They reflect the ongoing importance of boating and maritime life in this community.

The beach has a gentle slope that makes launching and landing small boats straightforward. Visitors should keep tides in mind and note that conditions can change depending on the weather.

Crabbing and scuba diving attract visitors to these waters year after year. The stable infrastructure with fuel and mooring services makes it a preferred stop for larger vessels too.

Location: Jefferson County

Opening Hours: 06:30-dusk

Website: https://parks.wa.gov/find-parks/state-parks/mystery-bay-state-park

GPS coordinates: 48.05837,-122.69535

Latest update: December 13, 2025 11:47