4.8
(1419)
14,021
hikers
04:44
18.4km
80m
Hiking
Hike the moderate 11.5-mile Marsh Island trail, gaining 268 feet, through wetlands with wildlife and urban views in 4h 44m.
Last updated: February 26, 2026
Waypoints
Start point
Parking
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8.87Β km
Highlight β’ Bridge
Tip by
18.4Β km
End point
Parking
Way Types & Surfaces
Way Types
8.06Β km
6.99Β km
2.83Β km
584Β m
Surfaces
8.01Β km
6.07Β km
3.41Β km
866Β m
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Elevation
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Thursday 14 May
17Β°C
7Β°C
44Β %
Additional weather tips
Max wind speed: 24.0Β km/h
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This route was planned by komoot.
The Marsh Island trail offers varied terrain. While generally considered an easy "urban romp," sections can become very muddy, or even impassable, especially during periods of high water. You'll find turnpikes and boardwalks in places to help keep you dry, though some elevated sections might be a bit "sketchy" or have holes. The route also takes you through open forest and marshy areas.
Yes, the trail is generally considered an easy "urban romp" and is suitable for beginners and families. However, be aware that some sections can get very muddy, particularly after rain or during high water levels, which might make it challenging for very young children or those with mobility issues. Boardwalks are present in many marshy areas.
You'll experience a diverse landscape, including views of marshy areas like Duck Bay, where kayakers and various ducks are often seen. The trail skirts the wetlands of Union Bay, offering views across to the University of Washington campus and boats. Lilypads often line the path, and wildlife such as great blue herons, cormorants, and other waterfowl are common. The route also passes through sections of open forest with notable trees like Giant Sequoias, and in the fall, the area is known for its vibrant foliage.
Yes, the trail offers several points of interest. You'll pass under the State Route 520 bridge, providing a unique perspective. There are also views across Duck Bay and Union Bay, offering glimpses of the University of Washington campus. Keep an eye out for the Bridge over Pushaw Stream, which is a highlight along the way.
Specific parking details for the Marsh Island trail are best found by checking local Seattle Parks and Recreation resources or the Washington Park Arboretum website. It's advisable to look for designated parking areas near the arboretum or trailheads to ensure legal and convenient access.
Generally, dogs are allowed on trails within the Washington Park Arboretum, which includes Marsh Island, but they must be kept on a leash at all times. Please be respectful of wildlife and other trail users by cleaning up after your pet.
The Marsh Island trail can be enjoyed year-round, but each season offers a different experience. Fall is particularly beautiful due to the vibrant foliage. However, be aware that during periods of high water, especially in wetter seasons, sections of the trail can become very muddy or even impassable. Spring and summer offer lush greenery and more predictable conditions.
The Marsh Island trail is part of the Washington Park Arboretum, which is generally free to access. Similarly, Dwight B. DeMeritt Forest typically does not require permits or charge entrance fees for day use. However, it's always a good idea to check the official Seattle Parks and Recreation or Washington Park Arboretum websites for any updated regulations or special event fees before your visit.
Yes, the Marsh Island trail is typically experienced as a loop, often referred to as the Foster and Marsh Island Loop. This allows you to see a variety of scenery without retracing your steps.
Yes, the Marsh Island trail is part of a larger network. It connects directly to the Washington Park Arboretum, allowing for extended exploration of its diverse plant collections. The route also passes through sections of official trails such as Sewall Road, Bike Road, Logan Road, and various segments of the Dorion Trail, among others.
Hikers should be prepared for potentially muddy conditions, especially after rain or during periods of high lake levels, as the trail's marshy nature can lead to sections becoming very wet or even temporarily submerged. While boardwalks are in place, some elevated sections might be in disrepair or have holes. Repair work has been funded to address issues and prevent submergence when lake levels are high, but it's wise to wear appropriate footwear and check recent trail conditions if possible.
Given the potential for muddy conditions, sturdy, waterproof hiking shoes are highly recommended. Layers of clothing are advisable for changing weather, and binoculars can enhance your birdwatching experience. Don't forget water, snacks, and a camera to capture the scenic views and wildlife.