Mystery Bay State Park — Attraction in Marrowstone Island

We launch our boat here every year over the Fourth of July! Nice dock to be able to walk to your vessel instead of having to wade through the water. Plenty of parking for trucks and boat trailer and have never had an issue with anyone messing with vehicle or equipment. The bathroom are always open and very clean. They also keep the toilet paper stocked and sanitizer available right by the door to use on your way out. Mystery has plenty of beach area to get your feet wet as long as it’s not high. My kiddos love jumping off the dock into the water every year and mystery is my daughters favorite spot to swim! We have even taken our kayaks out in the bay which is very calm water and perfect if you are just learning to paddle. Best part of course are the crab that are caught!

Amenities Include -Boat launch $7 per day to launch -Mooring available $ depend on boat size -Picnic tables -Bathroom (2) -Parking -discovery pass required, $35 for one year -dock -swimming...

A cute little park with a dock leading to public moorage, a boat launch, and a small beach (which ends on each end in private property). The beach is Rocky and has lost of barnacle covered rocks and shells, so barefoot is risky. Small grass area and a few picnic tables.

Decent parking - bring your Discover Pass (Washington state parks pass, $30/year) or pay for parking at $10/day. If you don't have a pass and want one, they are available at the Fort Flagler offices or from...

This tiny (10 acre) state park has a great location on Marrowstone Island, looking out on Killisut Harbor, so the view is picturesque, but it's really just a glorified boat launch. You could get out and walk your dog (allowed on leash), stretch your legs and watch for little crabs along 600+ ft of rocky beach, take a picture of the harbor, and use the restroom... or you could skip it and drive 2 miles north to the stunning Fort Flagler State...