Trail Running calendar near Seaside 2026-2027

We have found 20 Trailruns within 80 miles of Seaside. See below where and when you can find the races.

Tackle scenic single track trails around Henry Hagg Lake with a choice of 50K or 25K loops that wind through forest and brief road sections. Aid stations, food, finisher socks and tents await; bring your own cup or pack.

Run Forest Run at Lake Sylvia State Park offers 25K and 50K trail loops along scenic shoreline and through mossy forests. Expect steep, muddy February trails with lots of climbing for a rugged, rewarding winter trail experience.

March 2026

Run through tulip fields at Wooden Shoe TulipFest in Woodburn, Oregon with 5k, 10k and half marathon options and festival admission included. Expect off road trails, mud and variable spring weather for a scenic, fun challenge.

April 2026

Take on the Crown Stub 100, a scenic 100 mile ultramarathon through Stub Stewart State Park with over 7,000 ft of climbing and a 32 hour cutoff. A two person ultra relay lets teams share the adventure on the same challenging course.

Choose from quarter to full marathon distances on a scenic 6.5 mile loop at Stub Stewart State Park. Run one to four loops over varied trails and hills, then celebrate with awards, food and beer.

Run scenic river and ridge trails at Oxbow Regional Park near Portland on April 26, 2026, with 5k, 10k, and half marathon options. Limited to 150 runners, this trail race offers unique awards and a commemorative Oxbow cup.

May 2026

Run the Firelane Trail Trial on May 2, 2026 in Forest Park Portland, a steep 4.45 mile out and back up Firelane 1 with challenging grades and a live feed at the turnaround. Finish with a post race gathering at Great Notion Brewing; field ca..

Race to Space on May 9, 2026 at Linfield University's Wellness Trail in McMinnville offers timed 1 to 12 hour races, a four loop team relay, and a new Bingo Run for a fun, strategic twist. Proceeds benefit local charities.

Run through charred forests, waterfalls and single track in the Tillamook State Forest near Reehers Camp on May 16 and 17, 2026. Choose from 50 mile, 55K or the double option and enjoy full aid, timing and scenic coastal range views.

Wood You Rather at Mt Tabor Park in Portland on May 16, 2026 invites runners to use a simple map to find as many checkpoints as possible in two hours. Solo and team entries welcome, with coffee, donuts and a finisher mug.

Run Memorial Day weekend in Portland's Forest Park at Stumptown Trail Runs offering a rugged 50K and scenic half on forest trails. Proceeds benefit Forest Park Conservancy and spots are limited, so register early.

July 2026

Celebrate Independence Day with the Bigfoot Fun Run in Yacolt, WA on July 4. Choose a 5K or 10K run or walk and enjoy small town racing and community fun. Day of registration available.

Hellz Bellz Ultra in Yacolt, WA is a rugged trail race with a climb up Bells Mountain, stream crossings and Mt St Helens views, offering 50 mile, 50K and the Purgatory Trail Marathon. Tent camping is available and registration closes Apr 4.

Join Camp Lug A Chug on July 25 2026 at Marble Mountain Sno Park near Cougar WA to hike supplies into remote aid stations for the Volcanic race. Each day is about 9 miles roundtrip, free to join and with a prize for the top weight carrier.

August 2026

Experience Mt St Helens up close at Volcanic, a rugged trail race from Marble Mountain Sno Park on August 1 and 2, 2026 with 50K and 25K options. Tackle lava and boulder fields, steep climbs and lush forest for a memorable mountain adventur..

Take on a 20 mile single track trail run around Mount St. Helens near Cougar, Washington, winding through lava fields, stream crossings and old growth forest. Rugged, scenic and unforgettable for trail lovers.

Run rugged singletrack around Mount St. Helens on August 29, 2026, choosing 50K, 20 Miler, or Half Marathon from the Science and Learning Center at Coldwater Lake. Camping, aid stations, chip timing, and epic volcanic views await.

September 2026

Join the 36th Three Course Challenge at Camp Rilea near Seaside, Oregon on September 26 for middle and high school cross country races with live music by The Last Regiment Drum Corps. Scenic 3k to 5k courses, team lodging and social events.

October 2026

Challenge yourself on rugged rainforest singletrack at the Elk Kings Trail Races in Tillamook State Forest. Choose from 50K, 25K or 11 miles then celebrate at Smith Homestead with food, drinks, awards and a finisher pint glass.

Autumn Leaves at Champoeg State Park in St Paul, OR features 30K, 50K and 50 mile multi loop races on a fast, mostly paved 10K loop with gentle rollers. Headlamp is required for the first lap and aid stations are on course.