Trail Running calendar near Seaside 2026-2027

The Bigfoot 20 Mile Run is a trail adventure on the iconic Mount St. Helens. The single-track course takes runners past lava fields, through old-growth forests, and across streams on the volcano's southwestern flank.

Backcountry Rise offers 50K, 20 mile and half marathon loop courses on Mount St. Helens area singletrack, staged from the Mt. St. Helens Science and Learning Center with substantial elevation gain and remote sections.

A 5 km cross country race on a Tillamook flower farm featuring mud pits, two river crossings, wood-chipped trails and a corn maze. Two open races are held the same day with combined results and youth and adult categories.

Don your favorite costume and explore the magical trails of Gabriel Park in Portland. This inaugural 5K run and walk features themed villain zones and a heroes village for a unique fantasy experience.

The Mook XC Invitational is a 5 km cross country race at The Mook at Alderbrook Golf Course in Tillamook, Oregon on September 19, 2026. The championship style course runs mostly on shortly clipped fairways and includes youth and adult categ..

Experience a premier cross country tradition at Camp Rilea on the Oregon Coast. Choose between four distinct courses featuring hills and water crossings designed for middle and high school runners.

Test your limits on this 5k course featuring 22 mission-inspired obstacles to support the fight against human trafficking. Enjoy a day of climbing, crawling, and live music in Happy Valley.

Join the Sam Barlow High School Alumni Association for a 5K run or walk in Gresham. Younger participants can enjoy a 400m dash on the track and a virtual entry is available for remote supporters.

Experience the rugged beauty of the Tillamook Forest with technical mountain summits or scenic riverside trails. Choose between three distances spanning from 11 miles to 50 km in this classic Oregon rainforest event.

Experience the vibrant fall colors of Champoeg State Park on a fast and flat loop course along the Willamette River featuring ultra distances and a free kids run.

Races on the flat, mostly packed gravel Willapa Hills Trail in Chehalis offering 100 mile, 50 mile, 50K, 25K and 5K options with multiple aid stations, drop bags, pacer allowances and on site parking and camping.