Trail Running calendar near Sammamish Valley 2025-2026

Join the Harriers Gunner Shaw Cross Country Classic, a rugged 10 kilometre trail race at Thetis Lake featuring roots, rocks, hills and puddles. Stay for a friendly post race gathering as proceeds support local scholarships.

Run the trails at Capitol Forest near Olympia on your own schedule Nov 22 to Nov 30 and support the Thurston County Food Bank. Choose 12 km, 24 km or 35 km, share photos for awards and help raise funds for your community.

Join the Jumping Mouse Turkey Trot in Port Townsend on November 22, 2025 for a scenic, flat 5K on the Larry Scott Trail or a fun 1 mile kids run. Family and dog friendly, proceeds support children's mental health at Jumping Mouse.

Celebrate Thanksgiving at the Soaring Eagle Turkey Trot on November 27 in Sammamish with 2k kids, 5k, 10k and a technical 5 mile trail race through Soaring Eagle Park. All finishers earn a medal, registrants get a Turkey T shirt, and top ma..

Join the Redmond Reindeer Romp on Dec 6, 2025 at Redmond Watershed Preserve with 5 mile and half marathon options. Run scenic forest trails with gentle hills and earn Winter Trail Series swag.

Run scenic, rugged trails at Thetis Lake Park with technical single track, mud and water crossings plus a climb to Stewart Mountain for great views. Proceeds support the Harriers Foundation and youth development programs.

Pigtails Run in Maple Valley on Dec 13, 2025 offers 50K, marathon and half on scenic mixed trail with gravel and crushed rock. This low cost Fat Ass event celebrates self sufficiency and welcomes finishers with pizza and medals.

Celebrate the season with Saturnalia, a festive 10K trail run through Squaxin Park in Olympia on December 13, 2025. Enjoy wooded trails with views of Puget Sound and the state Capitol, holiday treats on course, and a medal for every finishe..

Run scenic coastal trails at Deception Pass State Park on December 13 and 14, 2025 with 50K, 25K and a kids 1K fun run. Expect technical single track, bluff views and two crossings of the iconic bridge.

Seward Solstice Run at Seward Park, Seattle on Dec 20. Choose a scenic 4.2 mile or 10k loop through old growth forest and compete in a costume contest with prizes.

Kick off 2026 with Absolution Run at St. Edward State Park on January 3, featuring 4 mile and 8 mile courses of swoopy single track and scenic shoreline. Enjoy technical descents, a rewarding climb back to the finish and hearty aid station..

Take on the Race to the Top of Mount Si on January 3, 2026, a steep 3.7 mile trail climb with 4,167 feet of vertical gain to the Rock Garden. Enjoy aid stations, a finisher shirt and medal, and fierce competition for the Golden Si award.

Celebrate winter trails at Bridle Trails Winter Running Festival, a daytime event returning for the first time in 30 years at Bridle Trails State Park. Pick 5 mile to 50k loops or relay teams and support the Bridle Trails Park Foundation.

Frost Eagle Trail Run on January 17 at Soaring Eagle Regional Park in Sammamish offers 5 mile and half marathon courses on twisty singletrack with rolling hills. Figure eight loops pass aid stations regularly for steady support.

Wake up for the Coffee Lovers and Chocolate Lovers 5K and 10K on Jan 18, 2026 in Sumner, Washington along the scenic Sumner Link Trail. Enjoy post race Keurig coffee and handcrafted Puyallup chocolates after your run or walk.

Run the Interlaken Icicle Dash in Seattle on January 31, choose 5k or 10k looped courses that weave paved boulevard and scenic dirt trails with a short climb. It is the final race of the Winter Trail Series, full of winter running charm.

Join the West Seattle Beach Run Fat Ass on Sunday, Feb 8, 2026 for a scenic marathon or half along Elliott Bay and through Lincoln Park. Enjoy waterfront views, skyline sights, and a friendly grassroots vibe on this out and back course.

Take on marathon, half marathon, 10 km or 5 km trail races at Fort Ebey State Park on Whidbey Island. Rolling forested kettle terrain and bluff top views of the Strait of Juan de Fuca and the Olympic Mountains make each mile scenic.

Choose from three out and back distances along the scenic Cascade Trail in Sedro Woolley, WA on a smooth railroad grade gravel path that climbs gently out and returns fast. Limited aid and parking, with postrace food and shirts.

Run Lord Hill in Snohomish on rugged single track with sustained climbs, creek crossings and distances from a 5K to a tough 50K. All finishers receive handmade swag powered by local solar energy.