Spring ultramarathons in Oregon, United States

50K and 25K routes through ancient sand dunes, old-growth forests, remote beaches, and stream crossings in Oregon Dunes National Recreation Area

High desert 55K through packed dirt, loose rock, technical climbs and descents, with sweeping Snake River and Owyhee Valley views near Adrian, Oregon

Six laps on scenic single-track trails through dense woods, frequent stream crossings, wildlife sightings, and approximately 566 feet of elevation change per c

Double out-and-back course across asphalt, gravel, and dirt trails with over 10,000 feet of gain through Oregon parkland and small-town landscapes

40-mile route on Peterson Ridge and Metolius-Windigo trails, with smooth singletrack, wooded surroundings, and open Central Oregon scenery

100K and 50K trail races through the Columbia River Gorge, centered in Cascade Locks with broad river views and a dramatic Gorge backdrop

Scenic 4.1667-mile loop course at Champoeg State Park along the Willamette River, last person standing format, no set finish distance

68-mile team relay from Roseburg to Coos Bay on rolling hills and rural countryside, finishing at Coos Bay’s historic waterfront

Singletrack forest trails through McDonald Forest, spring wildflowers, views of the Cascades and Coast Range, gentle pine needle descent to the finish

50K from Village Green Park with mostly singletrack, a short gravel-road stretch, 2,400 ft of climbing, and Cascade peak views.

Looped course at Linfield University with solo and relay options, timed races of varying lengths, on-course aid stations, and eco-friendly focus

50-mile and 55K routes through Tillamook State Forest, starting at Historic Reehers Camp, with an option for back-to-back racing

50K course through Forest Park on the Wildwood Trail, approximately 4,000 feet of elevation gain, spring scenery in Portland’s only ultra-marathon

Rugged 50K with two Spence Mountain summit climbs, steep technical singletrack, rocky footing, and demanding descents on dense forest trails.

Smith Rock and Crooked River Grasslands course with basalt cliffs, high desert terrain, and Cascade mountain views

Short-loop format at Cline Buttes, with repeated 0.4-mile climbs gaining about 870 feet and sweeping high-desert views of the Three Sisters Wilderness.