Trail Running calendar near SODO 2025-2026

The 37th Annual Seattle CF StairClimb is a fundraising stair-climb at T-Mobile Park in Seattle to benefit the Cystic Fibrosis Foundation. Participants climb in the stadium 300-level section on set routes that involve repeated ascents and descents of stadium stairs. Climbers self-identify as sprinti..

Cirque Series at Crystal Mountain, Washington, offers a 7.7-mile mountain race with 2,544 feet of elevation gain. The course begins in the base area, climbs Kelly’s Gap service road for about 1.7 miles to Green Valley, then ascends Grubstake to the high point at 6,861 feet. Runners traverse a ridge..

Ultra Fest in Easton, WA is a reimagined Cascade Super Ultra organized by Run Super Series. The racecourses run along the Foothills Trail in Washington’s Central Cascades, offering fast-ish, flat-ish gravel routes framed by rivers, forests and mountain scenery. Distances include 100M, 100K, 50M, 50K..

Tour de Bell is a trail running event in Olympia, Washington. The organizer lists several distance options, including a 35-mile course and shorter formats labeled as 6 Bells, 4 Bells, and 3 Bells, allowing participants to choose their challenge level. The event is associated with Olympia Trail Runne..

The Return of the Salmon Celebration - Salmon Run is held at Osprey Park in Sultan, Washington, celebrating the cultural heritage of the Skykomish River Valley and honoring Chief T'seul-Ted. The event features a scenic 5K trail run through the beautiful forest trails of Osprey Park and Susie's Trail..

The Moran Constitutional Relay is a demanding 70-mile trail relay held at Moran State Park on Orcas Island, Washington. Teams of two to six runners complete 12 legs ranging from 3 to 9 miles, featuring diverse terrain including lowland forests, rocky balds, lakeshores, wetlands, and the summit of 2,..

The Fidalgo Trail Run is scheduled for September 27, 2025 in Deception Pass State Park, with the start and finish at Bowman Bay (4402 Bowman Bay Rd, Anacortes, WA). Event distances include: 5 Mile Half Marathon Full Marathon Kid’s Race (about 0.6 miles, along the beach at Bowman Bay) Participants..

Mother RUCKer - 10K RUCK CHALLENGE is held in Eatonville, Washington, at Bud Blancher Trail Head (480 Weyerhaeuser Rd S). The event features a 10K ruck on a trail course, with participants including ruckers, walkers, and dogs; kids 12 and under are free. The atmosphere is community-driven and outdoo..

The Baker Lake Classic 25k is a scenic trail running event held in Concrete, Washington, along the eastern shoreline of Baker Lake within the Mt. Baker-Snoqualmie National Forest. Covering 15.6 miles, the point-to-point course features rolling terrain with about 3,400 feet of elevation change, passi..

The Golden 6 Hour is a scenic endurance running event held in Cle Elum, Washington, featuring a 2.45-mile single-track loop on the Swauk Forest Discovery Trail near Blewett Pass. Set amidst vibrant fall colors and turning larches, the course offers mountain views and a festive autumn atmosphere. Par..

The North Bend Trail Fest, held in North Bend, Washington, is a dynamic mountain running event showcasing the Snoqualmie Valley's outdoor offerings. The festival features multiple races, including the challenging North Bend Skyline 30k with 6,600 feet of vertical gain, the intense Mt Si Vertical Kil..

Middle Fork Trail Run, held near North Bend, Washington, starts at the Middle Fork Trailhead and takes participants onto the Middle Fork, CCC, and Snoqualmie Lake trails. Runners choose from four distances: 50k, 22-mile, Half Marathon, and 10k. The courses follow river valleys with modest climbing a..

Orca Recovery Day 5K Trail Run is a community event held at Clark's Creek Park South in Puyallup, WA, now in its 3rd annual edition. It offers a 5K trail course described as mild to moderately challenging, blending fitness with conservation education as participants learn about Orca recovery and sal..

The 4th Annual Fall Classic takes place on Saturday October 11, 2025, at PLU Meadows Disc Golf Course, 754 124th St S, Tacoma, WA 98444. The race offers 1K Kids run and a 5K for participants, with youth and high school cross country races following. The course is described as mostly flat with a few..

Mad Meadows is a trail race held October 11, 2025, near Leavenworth, Washington, with the start and finish at Grouse Creek Group Campground on Chiwawa River Road. The event offers two distances: 50K 50 Miler The course is remote and runs on USFS roads and single-track trails. Elevations reach ove..

The North Bend Skyline 30K is a challenging trail running event held in the scenic Snoqualmie Valley near North Bend, Washington. As part of the Vert Running Series Championship, it features a demanding course that tests runners' limits while offering stunning views of the valley and Cascade Mountai..

Run With The Kokanee is scheduled for Saturday, October 18, 2025, at Lake Sammamish State Park in Issaquah, WA. The event offers the following distances: 5k 10k (two laps of the 5k loop) Entry fees vary by registration period, online pre-registration closes on October 16, and day-of registration..

The West Seattle Monster Dash is an annual costumed 5K trail run/walk held at Lincoln Park in Seattle, WA. The 14th edition takes place in October 2025 and features a 5K Run/Walk, a Kids Monster Dash for children 12 and under, and a "Just a Shirt!" option. Participants receive a t-shirt with the ico..

The Carkeek 12-Hour is scheduled as an in-person event on October 25, 2025, with a virtual option available October 1-31, 2025. The event takes place at Carkeek Park in Seattle, Washington (950 North West Carkeek Park Road). Registration is capped for this event series at 50 runners. Proceeds and d..

The Cougar Mountain Trail Run is held at King County’s Cougar Mountain Regional Wildland Park with the event center at Sky Country Trailhead in Bellevue, WA. The October race is part of the Cougar Mountain Trail Run Series, organized by Seattle Running Club and Northwest Trail Runs. A portion of ea..