Trail Running calendar near Seattle 2026-2027

Join the A2PT 5K MS Fundraiser at Titlow Park in Tacoma for a family friendly 5K supporting the National Multiple Sclerosis Society. Enjoy music, coffee, snacks, swag and a postrace raffle while helping a great cause.

Spring Run For Fun invites trail runners to scenic Bridle Trails State Park in Kirkland, WA with 5 km, 10 km, half marathon, and marathon options on a rolling looped course. Enjoy forest trails, friendly aid stations, and on-site registrati..

Run the inaugural Whitehorse Oso Strong Half in Arlington WA on Mar 28, 2026, a 13.1 mile out and back at Fortson Mill Trailhead honoring resilience and community spirit. Finishers get a medal and all paces are welcome.

Enjoy the scenic Redmond Marathon along Sammamish River and Marymoor Park trails with full and half options on a Boston qualifying out and back course. Friendly aid stations and prize bonuses await top finishers.

Join the official Daffodil Festival run on Sunday March 29, 2026 in Puyallup for the 6th annual Daffodil 8K. Enjoy a flat, chip timed, family friendly course from Van Lierop Park across the scenic Foothills Trail.

Run Kelly Ridge on the Olympic Adventure Trail in Port Angeles with 12K, half marathon and 50K single track courses offering coastal and forest views. Limited fields, pre registration required, proceeds support local trail groups.

Run the Vancouver Island Trail Running Series at Royal Roads University in Colwood on April 11, 2026 with scenic 11 km and 6 km courses plus a 1 km kids race supporting local trail stewardship. GPX routes, a campus start and post race food..

Take on scenic Royal Roads University trails in Colwood BC with 11 km and 6 km options plus a 1 km kids race, featuring rewarding climbs, post race food and prize draws. This cupless event asks you to bring your own drinking cup.

Squak Mountain Trail Runs at Squak Mountain State Park offer 12K, half marathon and 50K loop courses with big climbs, summit views and historic forest scenery. Kids races, aid stations and a brunch run make it a full day for trail lovers.

Tiger Claw returns May 8 to 9, 2026 in Issaquah WA with steep climbs and focused descents on rugged Tiger Mountain trails. Choose the Ascent, the 50k, the Big Cat combo, or the new three person Ambush relay for a true Pacific Northwest test..

Run wooded trails through Battle Point Park and Grand Forest at the Trillium Trail Run on Bainbridge Island. Pick 5K, 10K or a kids fun run while supporting the Trails Connect Bainbridge Island campaign to build and maintain local trails.

Join the 22nd annual Cougar Mountain Trail Run Series in Bellevue on May 9, 2026, for scenic single track trails through forest, marsh, and rolling hills. Choose 5 or 10 mile options and help support King County Parks.

PIGTAILS Run returns to Maple Valley for its 20th running with 50K, marathon and half marathon options along river and forest trails. Expect rugged low support, strict cutoffs, and a fun piggy finisher medal; event rescheduled for early 202..

Soaring Eagle Trail Run in Sammamish features 5K, 10K, half marathon and a kids race with post race brunch runs. Scenic rooty trails with modest climbs, cupless aid stations and a handmade finisher item powered by solar energy.

Join Leavenworth Trail Fest in Leavenworth WA on May 23 2026 for mountain races from a family friendly 5k to challenging 27k and 55k routes, plus a lively festival and Trail Family Food Tent. Finishers can select a keepsake or plant a tree.

Challenge yourself on the Freedom 50 ultramarathon in Puyallup on May 23, 2026, with 50 mile or 50k options along the scenic Foothills Trail. Mostly paved course with strong aid station support and finisher medals plus local sponsor perks.

Timed ultrarun on a scenic 1.75 mile loop around Lake Tye in Monroe, WA. Choose your time, run as many laps as you can, earn a wooden medal coaster, and help raise funds for local trails and charities.

Run Vashon Island on June 6 with 50K, 20 mile and 10 mile trail options on a scenic, challenging loop of roots, hills and varied footing. Limited to 200 runners, proceeds support island youth athletics and Friday camping is available.

Rainier to Ruston Rail-Trail Relay (R2R) is a National Trails Day running event spanning from Mount Rainier to Ruston, near Tacoma, Washington. Scheduled for June 6, 2026, the race brings athletes and community members together to run along..

Run scenic loops at Tiger Mountain State Forest on June 6, 2026, from a rolling 5K to a half marathon with big climbs and sweeping singletrack descents. Bring hydration for longer distances.