Green River, Duwamish, and Alki Trails Loop

This loop is generally considered easy to moderate for road cycling. While it's predominantly flat, you'll share the multi-use trails with pedestrians and dog walkers, especially in busier areas. Some sections of the Green River Trail can be bumpy due to frost heaves and tree roots, and navigation might require attention in areas with less signage.

The loop offers a diverse range of scenery. You'll experience industrial and urban views along the Duwamish River, with sights of working industry and tugboats. The Green River Trail transitions to more natural, pastoral settings with river views and wooded areas. Finally, the Alki Trail provides picturesque waterfront views of Puget Sound, the Olympic Mountains, and the Seattle skyline, including the View of Seattle Skyline from Jack Block Park.

Yes, due to its largely flat and paved nature, the loop is generally suitable for beginners comfortable with longer distances. However, be prepared for shared-use paths, potential navigation challenges in some sections, and occasional bumpy surfaces, which require vigilance.

The full loop is approximately 55 kilometers (34 miles) long. For a racebike, it typically takes around 2 hours and 20 minutes to complete, though this can vary based on your pace and how often you stop to enjoy the sights.

Yes, the trails that make up this loop are generally dog-friendly. However, as they are multi-use paths, always keep your dog on a leash and be mindful of other users, including pedestrians and cyclists.

The best time to cycle this route is typically during the spring, summer, and early fall months when the weather is milder and drier. While accessible year-round, winter can bring colder temperatures and potentially wet conditions, and some sections might be bumpier due to frost heaves.

No, there are no specific permits or entrance fees required to access and cycle the Green River, Duwamish, and Alki Trails Loop. These are public multi-use trails managed by King County and Seattle Parks.

Parking is available at various points along the individual trails that form the loop. Popular access points include parks along the Green River Trail, such as Fort Dent Park, or near the Alki Trail in West Seattle. Check local park websites for specific parking lot locations and availability.

Yes, the individual trails within this loop are key components of King County's regional trail system. The Green River Trail connects with the Interurban Trail, and the Alki Trail has easy connections to the Duwamish Trail and the West Seattle Bridge Trail, offering opportunities for extended rides or alternative routes.

Beyond the diverse scenery, you can spot osprey nests and even salmon jumping in the Green River during certain seasons. Along the Duwamish Trail, you'll pass sites of cultural importance to the Duwamish Tribe, such as the həʔapus Village Park, featuring interpretive signage and public art. The Green River Trail also includes a Native American cultural site, North Wind's Weir.

Given that the loop passes through urban and industrial areas, there are various opportunities to find cafes, restaurants, and convenience stores, especially near the Alki Trail in West Seattle and in communities along the Green River Trail. It's advisable to carry water and snacks, but you won't be far from amenities.