Trail Running calendar near Downtown Seattle 2026-2027

Experience a flat and fast USATF certified race along the Cedar River in Maple Valley featuring scenic trestles and limestone paths. Finishers enjoy a medal and hot chili after completing their choice of a half marathon 10k or 5k.

A Spartan obstacle race weekend at Meadow Wood Equestrian Center in Snohomish WA on May 2 and 3 2026. The event uses wooded dirt trails beside the Snohomish River and includes Sprint 5 km, Super 10 km and a Kids Race.

Tiger Claw is a multi route trail event on Tiger Mountain near Issaquah on May 8 and 9, 2026. It features a *50k* plus Ascent, Big Cat and Ambush routes, and requires completion of three summit loops within the event cutoff.

Explore the trails of Bainbridge Island. This May event offers 10K and 5K courses through Battle Point Park, the Forest to Sky Trail, and the Grand Forest, plus a Kids Fun Run. All proceeds support local trail development.

A trail race at Cougar Mountain Regional Wildland Park offering 5.1 mile and 10.8 mile courses through forest and marshes near Seattle. Organized by Seattle Running Club and Northwest Trail Runs as part of a 21st annual series supporting Ki..

A 20th anniversary running event in Maple Valley, WA on May 9, 2026, with races from a half marathon to 50K. The riverside, wooded course offers modest support, a piggy medal for finishers, and a strictly enforced cutoff.

The Elk/Beaver Ultras feature a fast, flat 10 km trail loop around Elk and Beaver Lakes near Victoria. The event offers four looped distances, from a 40 km walk to a 100 km run, on a precisely measured course. It's a historic race that has..

Test your endurance in the Chuckanut Mountains with a variety of timed vertical challenges. Complete as many mountain laps as possible to support clean air initiatives and climate change awareness in Washington.

Trail races at Soaring Eagle Regional Park in Sammamish WA offer multiple distances from kids races to a half marathon. Courses start on the Pipeline Trail and follow winding, mostly flat forest singletrack with rooty sections.

Experience a rugged trail race at Green Mountain featuring significant elevation and scenic summit views. Choose between 25k and 50k distances or join the official rucking division for a unique weighted pack challenge.

A trail race at Rattlesnake Ridge near Snoqualmie offering 5K, 5.8 mile and half marathon routes on single-track trails with significant climbing, ridge views, and aid stations on the longer courses.

A community fundraising event on May 16, 2026 in Fairhaven Park featuring a half marathon, 10K and 3K/6K on nearby trails. Proceeds support Girls on the Run of NW Washington.

A trail running weekend in Leavenworth, Washington featuring races from a town 5K to a two loop 55K. Courses use Ski Hill ridgelines with significant elevation gain, aid stations, festival activities, and awards across multiple divisions.

An ultramarathon in Puyallup, WA offering 50 mile and 50k courses along the paved Foothills Trail. The route includes the new White River bridge, multiple aid stations, and a 15 hour cutoff for the 50 mile distance.

Timed loop races in Seattle's Magnuson Park offering seven and thirteen hour options on a scenic 1.54 mile mixed surface loop with chip timing, a well stocked aid station, participant medallions, a race tee and a boxed vegetarian post race..

Loop ultraruns at Lake Youngs Watershed near Renton WA offer distances from 50 kilometers to 200 miles. Each loop has 900 feet of elevation gain and the course provides repeated on course support and aid between laps.

A trail event at Soaring Eagle Park in Sammamish on May 25, 2026 offering 5-to-25 mile distances on a five-mile loop, with aid stations every 2.5 miles, course markings, awards, finish food, and raffle prizes.

Experience a forested trail run through a scenic Seattle ravine with 4k, 8k, and 12k options. Enjoy groomed trails and a post race grill session featuring hot dogs and watermelon at Ravenna Park.

Timed 12 hour, 6 hour and 3 hour loop runs on a 1.70 mile paved circuit around Lake Tye in Monroe, WA. Aid stations, chip timing, participant medals and post race food and awards are provided.

Explore the open pine forests of the Teanaway Valley with 2, 4, or 8 hour navigation challenges. Use detailed orienteering maps to find checkpoints in a beautiful landscape featuring wildflowers and rugged terrain.