Mystery Bay State Park is a marine state park located on the western side of Marrowstone Island in Jefferson County, Washington. This park features a secluded cove and 685 feet of saltwater shoreline, offering views of the Olympic Mountains and Admiralty Inlet. The landscape includes a rocky beach, grassy shorelines, and coastal forests, providing a setting for several sports like hiking, road cycling, jogging, and touring cycling. The park's natural features make it a relevant area for various outdoor pursuits.
Mystery Bay State Park and its surrounding area offer numerous routes for outdoor enthusiasts. Hikers can explore short walks along the shoreline within the park or venture into the extensive trail networks of nearby Fort Flagler State Park, which feature coastal forests and historic sites. Cyclists will find opportunities for both Road Cycling Routes in Mystery Bay State Park and Cycling in Mystery Bay State Park, with the broader Olympic Peninsula providing longer routes like the Olympic Discovery Trail. Joggers can utilize the park's paths and the accessible trails in adjacent areas, as detailed in the Running Trails in Mystery Bay State Park guide. More than 500 visitors have shared their experiences, resulting in an average rating of 4.44 out of 5 stars for the activities available in this region.
36
Routes
4.6
(29)
Average rating
232
People visited

12
hikers
6.96km
01:52
80m
90m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

1
hikers
3.63km
01:00
60m
50m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

210km
55:02
1,710m
1,710m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

4.0
(1)
4
hikers
5.26km
01:28
100m
90m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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4.4
(12)
44
riders
26.1km
02:21
190m
190m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

4.0
(1)
14
riders
40.8km
02:57
440m
440m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

22
riders
31.3km
02:24
230m
230m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

4.4
(8)
16
riders
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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12
riders
31.9km
01:31
400m
400m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

5.0
(1)
8
riders
56.2km
02:25
500m
500m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

40.7km
01:57
580m
580m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

113km
05:46
1,640m
1,640m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
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6
runners
25.3km
03:01
190m
190m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5
runners
7.27km
00:49
80m
80m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

3
runners
6.31km
00:42
130m
130m
Moderate run. Good fitness required. Mostly accessible paths. Some sure footedness required.

1
runners
5.70km
00:37
50m
50m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Mystery Bay State Park is a marine state park located on the western side of Marrowstone Island in Jefferson County, Washington. It features a secluded cove and 685 feet of saltwater shoreline. The park offers views of the Olympic Mountains and Admiralty Inlet.
Mystery Bay State Park and its surrounding area offer opportunities for hiking, road cycling, jogging, and touring cycling. Other marine activities include boating, kayaking, crabbing, clamming, oyster harvesting, saltwater fishing, and beachcombing. The park also provides picnic tables and fire rings.
The park offers short walks along its grassy shoreline. For more extensive hiking, visitors can explore the trail network of the neighboring Fort Flagler State Park, which includes coastal forests and historic military structures. More information is available in the Hiking in Mystery Bay State Park guide.
The park itself offers short, easy walks along its shoreline. Nearby Fort Flagler State Park provides trails with varying difficulty, including options suitable for easier excursions. Consult the Easy hikes in Mystery Bay State Park guide for specific routes.
Short walks within Mystery Bay State Park are suitable for families. The adjacent Fort Flagler State Park also features trails that can accommodate family outings. Details on suitable routes can be found in the Family-friendly hikes in Mystery Bay State Park guide.
While the park itself is small, its location on Marrowstone Island provides access to regional cycling routes. The Olympic Discovery Trail is a prominent option, offering a 130-mile route across the North Olympic Peninsula. Guides for Road Cycling Routes in Mystery Bay State Park and Cycling in Mystery Bay State Park are available.
The broader Olympic Peninsula region, accessible from Mystery Bay State Park, includes routes designed for non-motorized use, such as sections of the Olympic Discovery Trail. For specific traffic-free options, refer to the Traffic-free bike rides in Mystery Bay State Park guide.
The short walks within Mystery Bay State Park are suitable for jogging. Additionally, the extensive and easily accessible trails in nearby Fort Flagler State Park offer more options for runners. Information on suitable paths is available in the Running Trails in Mystery Bay State Park guide.
Mystery Bay State Park is defined by its secluded cove and 685 feet of saltwater shoreline. It features a rocky beach and grassy shorelines, with views of the Olympic Mountains and Admiralty Inlet. The surrounding area, particularly Fort Flagler State Park, includes coastal forests.
Mystery Bay State Park has received an average rating of 4.44 out of 5 stars from more than 60 ratings. Over 500 visitors have shared their experiences for activities in this region on komoot.
Komoot offers several guides for the area, including Hiking in Mystery Bay State Park, Family-friendly hikes, Road Cycling Routes, and Running Trails. Other guides cover easy hikes, general cycling, traffic-free bike rides, hikes from bus stations, and city hikes.
The official website for Mystery Bay State Park is part of the Washington State Parks website. The park can be contacted directly at (360) 385-1259. For general Washington State Parks information, the number is (360) 902-8844.

