Trail Running calendar near West Seattle 2026-2027

Trail out and back on the Sammamish River Trail from Bothell Landing offering a half marathon, a full marathon and a 50K. Water and snacks are available and finishers receive a wooden medal.

A scenic community run or walk near Mossyrock Park offering a 5K and an 8K Hill Challenge that crosses Mossyrock Dam and provides views of Riffe Lake. Family pricing and age-based fees apply; partial refunds available until June 13.

An evening trail run at Seward Park on July 7, 2026, featuring a mostly forested loop with **4.2 mile** and **10k** options, an aid station, post-race food, youth series scoring, and awards for top finishers.

A multi-distance trail event at Cougar Mountain Regional Wildland Park near Seattle, featuring forested single-track, rolling hills and marshside trails. The 21st annual series supports King County Parks and includes a multi-race series com..

Mud Mountain Trail Fest is a trail running event at Mud Mountain Dam in Enumclaw, Washington on July 11, 2026. It offers a 4 Miler and a 10K on forested trails described as moderately challenging.

An all-ages glow run through the Snoqualmie Tunnel on the Palouse to Cascades trail with LED lighting, two participant waves, onsite merch options, and a post-race outdoor block party with food, games and drinks.

A 5K trail run and walk on Tiger Mountain with an out and back route over unpaved roads and a short cross country section. The event is clothing optional and is sponsored by Tiger Mountain Family Nudist Park.

Trail races at Crystal Mountain near Mount Rainier on July 17 and 18, 2026, include a 5K hill climb, a 10K downhill and a half marathon. Registration includes an all day gondola pass and the weekend offers an expo, camping and race photos.

A 100 mile endurance run through the Cascade Mountains near Easton, Washington, run under a special use permit in the Okanogan-Wenatchee National Forest. The event centers on a long standing community of organizers, volunteers, HAM operator..

The JBLM Down and Dirty Trail Run will take place in Joint Base Lewis-McChord on Saturday 18 July 2026. You can run 3 miles.

Trail races at St. Edward State Park near Lake Washington offering 4 mile and 8 mile looped courses on mixed single track and wider trails, with an aid station at the start/finish. Part of the Tuesday Night Trail to Grill series.

Dirt Circus Seattle is a one-day community running festival on July 22, 2026, featuring a group run with short and longer routes, an expo with vendors, food, and a raffle. Check-in is at Seven Hills Running and the event is cupless.

A trail ultramarathon near Greenwater, WA with 50M, 50K and 25K options on mostly single track. Routes start and finish at Ranger Creek Campground with significant elevation gain and multiple aid stations.

A two-day trail running event in Hoodsport, WA featuring a **22 km** skyrace to Mt. Ellinor and an **8 km** forest loop, part of international skyrunning and qualification series.

Test your endurance at the Esmeralda Trailhead with a weighted rucking event. Carry a 20 lb pack through the mountains near Cle Elum to reach the summit and earn your dog tags.

Challenge yourself on the historic stairs of Tacoma at the Unleashed at Stadium Bowl. Choose from one or two laps totaling up to 3256 steps to support local animal rescue efforts.

A community trail running event at Cougar Mountain Regional Wildland Park offering 5k, 14.5 mile and 26.2 mile courses through forested, varied single-track; part of a multi-race series with youth scoring and aid stations along each course.

A multi-distance road and trail race in Coupeville on Whidbey Island, running through Ebey's Landing National Historic Preserve with ocean, prairie and mountain views, plus a virtual option.

A mostly downhill rail-trail marathon and half marathon through the Snoqualmie Tunnel and mountain scenery. Both races will be USATF certified and the marathon will be a Boston qualifier; packed gravel surface and shuttle service are provid..

Test your endurance at Lincoln Park by completing as many two mile loops as possible within your chosen time window. This inclusive event features adult timed trials up to 18 hours alongside dedicated kids races.