Trail Running calendar near Downtown Seattle 2025-2026

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 trails at Thetis Lake Park with 10 mile and 5 mile options, including a steep climb up Stewart Mountain and muddy water crossings. Enjoy community vibes, hot drinks, age category awards and fundraising for Harriers Foundation sch..

The Pigtails Run in Maple Valley on Saturday December 13 2025 offers 50K, marathon and half marathon courses along the scenic Cedar to Green River Trail. Expect mostly paved trail, modest on course support, and finish line pizza and soup.

Celebrate the season with Saturnalia, a Rock Candy Running year end 10K through Squaxin Park in Olympia with Puget Sound and Capitol views. Finish to festive aid station treats and a commemorative medal.

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.

Join the Trio Trail Run at Frontier Park on December 14 for a relaxed community trail outing with 2.5K and 5K two loop options. Laid back vibe, youth discount for pre registration, and day of registration is available.

Celebrate the solstice on a scenic loop through Seattle's Seward Park, choose a 4.2 mile or 10k and enjoy forest trails and playful terrain. Dress up for Glitter Glamour and the Galaxy costume prizes and score limited edition series socks.

Explore St. Edward State Park on January 3, 2026 with 4 mile and 8 mile loops that hug the lakeshore and weave through twisting single track. This USATF sanctioned Winter Trail Series stop offers finish aid and season perks.

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.

Join the Frost Eagle Trail Run at Soaring Eagle Regional Park in Sammamish on January 17 with 5 mile and half marathon options on rolling forest singletrack. Part of the Winter Trail Series, the course winds through wetlands and offers on c..

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.

Join the Get Outside 5k Fun Run on Jan 24 in Burlington for a family friendly run along the Port of Skagit Trails starting at True North Bakery. Proceeds benefit Boys & Girls Clubs of Skagit County and entry includes a free race shirt.

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.

Join the Trio Trail Run February at Frontier Park in Graham on Feb 8, 2026 for a relaxed, laid back trail morning. Choose 2.5 km or a two loop 5 km course, with pre registration discounts for youth and day of race sign up available.

Run scenic, rolling singletrack through forested kettle depressions and bluff top waterfront views at Fort Ebey State Park on Whidbey Island. Choose from 5 km, 10 km, half marathon or marathon and earn a finisher medal.

Run Forest Run at Lake Sylvia State Park near Montesano is a rugged trail race with 25K and 50K loops and about 2,900 feet of climb per loop. Camp on site and enjoy post race food while supporting local trails.

Woolley Trail Runs in Sedro Woolley, Washington offers 50k, marathon and half marathon on a scenic railroad grade gravel trail. Out and back courses, limited aid and parking, so bring your own supplies.

Join the inaugural Song Sparrow Bridge 10K in Sedro Woolley on Feb 14 for a free, untimed trail run through cedar and fir groves, crossing two handcrafted bridges. Enjoy Starbucks warm drinks and a scenic loop on Skagit Trail Builders trail..