Trail Running calendar near West Seattle 2026-2027

A fall trail run at Bob's Corn and Pumpkin Farm featuring a 5k one-lap maze option and a 7k two-lap maze option on farm roads and paths.

A USATF certified marathon and half marathon in North Bend WA on September 13 2026 featuring a downhill packed gravel course and a run through the Snoqualmie Tunnel.

A timed stair-climb at T-Mobile Park where participants tackle either 900 or 1,800 stairs to raise funds for the Cystic Fibrosis Foundation. Climbers start in waves by self-identified pace and join an official after party.

A multi-day Spartan obstacle race weekend in Monroe WA featuring wooded Pacific Northwest trails and a program of Sprint, Super, Beast, kids races, workshops and spectator access.

Cirque Series at Crystal Mountain is a 7.9 mile trail race with 2,614 feet of vertical gain on September 19, 2026. Sport, Expert and Pro divisions offer prizes and series points, and timing is by disposable bib chip.

A two day 70 mile trail relay at Moran State Park on Orcas Island, run over twelve legs by teams of two to six. The course moves through forests, lakeshores, wetlands and the 2,399 foot Mount Constitution summit.

Ultra Fest in Easton, WA offers trail ultramarathon distances from 25K up to 100 miles on September 19–20, 2026, with on-site parking and day-of registration.

An alpine ultratrail near Cle Elum WA offering 100M, 50M and 50K courses on remote, rugged Cascade trails with large elevation gain and serviced aid stations.

A fantasy themed 5K walk and run at Magnuson Park with mixed trail surfaces, Villain Zones, and a Heroes Village; costumes encouraged and leashed dogs and strollers welcome.

Experience the historic landscapes and vibrant forests of Cle Elum and Roslyn. Choose between a 10K or 15K trail run through the scenic coal mining heritage of the Pacific Northwest.

Trail race at Deception Pass State Park with 5 Mile, Half, and Full routes that start and finish at Bowman Bay and cross the Deception Pass Bridge.

A two-day mountain running festival in North Bend, WA with a steep Mt Si VK, Skyline 30K, a Little Si 10K, community activities, and prize awards.

A 5K and 10K trail run at Lake Crescent in Olympic National Park on October 3, 2026, with shuttle service and limited trailhead parking.

A last-one-standing backyard ultra where each completed loop adds $100 to a shared prize jar and the final payout is split 75% to the winner and 25% to the runner-up.

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 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.

Where's Bigfoot 5k takes place in Seattle on October 17, 2026 with in person, virtual, and free untimed kid entries. The course is 3.1 miles and registration periods and fees vary by entry type.