Trail Running calendar near Renton 2026-2027

A roughly 10K trail race in Squaxin Park with start and finish at Reeves Middle School, holiday-themed aid, finisher medals, and a tree planted per finisher.

A forest loop at Seward Park on December 19, 2026, offering **4.2-mile** and **10k** trail distances, an aid station, and a Glitter, Glamour, and the Galaxy costume contest as part of the Winter Trail Series.

Timed endurance event at Fort Steilacoom Park on Dec 26, 2026 with 3, 6, and 8 hour options on a 5 mile loop with 520 ft of gain.

A winter trail run at St. Edward State Park offering 4 mile and 8 mile looped courses with lakeshore single track, an on-course aid station, and nearby parking options including an alternate Bastyr University lot.

A Winter Trail Series event at Soaring Eagle Regional Park on January 16, 2027 offering 5 mile and Half Marathon courses on rolling, technical singletrack with multiple aid stations.

Interlaken Icicle Dash at Interlaken Park in Seattle on January 30, 2027 offers 5k and 10k trail races as the final event of the 2026/27 Winter Trail Series. The course uses a 2.5 km loop on paved boulevard and dirt trails.

Woolley Trail Runs offers three out and back races along the Cascade Trail near Sedro Woolley WA. Courses run on railroad grade gravel with limited aid stations and several road crossings where runners must watch for traffic.

A loop-based endurance run at Green Lake Park in Seattle where runners complete as many 3.2 mile laps as possible in timed formats. Events are offered in 12 hours and 5 hours.

Trail races at Deception Pass State Park featuring a 13.1 mile half, a 10K and a combined 19.3 mile double on coastal bluffs and single track trails.

Trail races on the Olympic Adventure Trail near Port Angeles, Washington, offering point to point 12K and half marathon plus an out and back 50K on singletrack, limited fields, cupless hydration, shuttle service, and a post-race meal.

Weekend Spartan obstacle races at Meadow Wood Equestrian Center near Snohomish with 5 km and 10 km courses plus kids races and spectator options.

Trail weekend at Tiger Mountain near Issaquah featuring an ascent, a 50k, a three person relay and a combined Big Cat option.

Scenic 10K, 5K and kids 1-mile runs from Battle Point Park along the Forest to Sky Trail on Bainbridge Island with proceeds supporting local trail development.

Trail races and a weekend festival in Leavenworth, WA on May 29, 2027 with 5k, 25k and 50k options plus family and youth events.

Timed loop races in Magnuson Park with 13 hour and 7 hour solo options on a scenic 1.54 mile loop, chip lap counting, aid station, t shirt and boxed vegetarian meal.

Looped trail races on Vashon Island featuring 50K, 20 mile and 10 mile courses through the Gateway Trail system and mixed-terrain park trails.

A timed loop event at Lake Tye in Monroe WA featuring 12 hour, 6 hour and 3 hour races on a 1.70 mile paved loop with aid stations and chip timing.

A three day team stage relay through North Central Washington with old school navigation, mixed trails, and daily routes that end in mountain towns.

The Sisu 100 PNW will take place in Crystal Mountain on Friday 25 June 2027. You can run 100 miles.

A 24 hour choose-your-own-adventure trail event at Camp Sheppard, WA with six routes, nine side quests, live leaderboard, and solo or three person teams.