Trail Running calendar near Seattle 2026-2027

A last-person-standing backyard ultra on October 3rd, 2026 where a $100 bill is added to the prize jar each lap; the winner and runner-up split the accumulated pot 75/25 and 24 laps earns a 100-mile buckle.

Baker Lake Classic 25k on Sunday October 4, 2026 is a 25k event organized by NW Endurance Events. Registration closes October 3 and the entry fee is $80 with a race shirt offered for $25.

The North Bend Skyline 30K will take place in North Bend on Monday 5 October 2026.

A remote October trail event near Leavenworth featuring **50k** and **50 mile** courses with alpine ridgelines, golden larches, technical single track, significant elevation gain, and cupless aid station support.

A six hour trail running event on the Swauk Forest Discovery Trail near Blewett Pass on October 10, 2026. The 2.45 mile single track loop has about 650 ft of climbing and features a fall themed potluck aid station and a post race dinner opt..

Trail races on the Middle Fork and CCC trails in North Bend, WA, on October 10, 2026. Distances from 10k to 50k feature river valley scenery, aid stations, and some unbridged creek crossings.

Community run at PLU Meadows Disc Golf Course offering a 1K kids run and a 5K. Proceeds support local youth running programs and a college scholarship.

A multiformat endurance event at Salt Creek Recreation Area with 12 hour and 24 hour loop options, a relay format, and a Last Runner Standing summit challenge offering coastal views and stocked aid stations.

A looped trail fundraiser at Carkeek Park in Seattle offering timed 12 hour and 6 hour options in person on October 24 2026 and virtually October 1 to 31. The 1.93 mile loop gains 436 feet per lap and entries are capped at 50.

A costumed community event at Lincoln Park featuring a trail 5K, kids dashes, and a virtual shirt option to support South Seattle College Cooperative Preschools. Registration includes a Monster Dash shirt and the 5K includes a timed bib.

An evening team relay in Ten Trails where teams of one to three hunt and return six hidden ghosts in Civic Park; free registration, prizes for fast finish, best team name, and best costume.

A 10K trail race in Port Gamble, Washington on October 31, 2026. The course mixes single track and dirt roads with about 600 feet of climbing and a pre race costume contest; the field is limited to 100 entrants.

Trail races at Cougar Mountain Regional Wildland Park near Seattle offering 5k, 7.6 mile, 19.5 mile and 50k courses through forested single track, rolling hills and marshes. Proceeds support King County Parks.

The Grand Ridge Trail Run closes the Evergreen season at Grand Ridge Park near Issaquah with multiple looped courses from 5 miles to 50K, significant elevation gain, stocked aid stations, and a cupless race policy.

A flat, out-and-back trail festival in Chehalis offering distances from 5K to 100 miles along the Willapa Hills Trail. The event features packed gravel surface, multiple aid stations, low entry fees, and support for trail maintenance.

A forested trail run at Carkeek Park in Seattle offering 5k and 10k courses with rolling and steep sections, an aid station at the start, and a youth discount for runners under twenty. Dogs are not allowed on the course.

Scenic trail races at Deception Pass State Park in November, offering 50K and 25K courses that cross the historic bridge and run varied single-track with aid stations, drop bag support, and a separate 1K kids loop.

Celebrate Veterans 5K in Tacoma, WA is a community run and walk on November 15, 2026 at Pipeline/Orange Gate Park that honors veterans and supports Project Recover. Registration includes chip timing, a commemorative medal, race photos, and..

Ravenna Refresher is a trail run at Ravenna Park in Seattle offering 4k, 8k, and 12k on a 4.1 km loop through forested ravine. The event includes an aid station, a youth discount, and is part of the Winter Trail Series.

Trail run at Redmond Watershed Preserve offering 5 mile and half marathon options on mostly wide, smooth trails. The half marathon repeats a 6.55 mile loop and includes two aid stations; a Winter Wonderland costume contest is part of the ev..