Mystery Bay State Park features a single-lane boat launch ramp that drops gently down the beach, accommodating various watercraft sizes, along with 683 feet of moorage (including 7 buoys) available year-round for $23 per buoy or $1 per vessel foot for dock space.

The park offers a $7 daily launch fee and includes amenities such as a pumpout station (April-October for vessels up to 55 feet), picnic tables, fire rings, and restrooms, making it an accessible entry point to Puget Sound and the Cascadia Marine Trail.

A Discover Pass is required for day-use access.