January ultramarathons in United States (Pacific North West)

Winter backyard ultra in Idaho Falls: repeating grass, dirt, and pavement loop, variable snow, and a last-person-standing format.

Scenic Oregon coast 50K with coastal trails and post-race potluck at Yachats Commons

Loop course on uneven, muddy winter trails at Bridle Trails State Park, shifting from daylight to night

Four 7.75-mile loops around Pullman on a scenic winter course through the Inland Northwest

Mountain ascent on a cold, wet, and rugged course through scenic terrain; endurance-focused route reflecting Olytrailrunners tradition

Scenic double out-and-back on Kirkland Corridor Trail with frequent runner sightings and easy aid station access

Rugged winter trails with unpredictable weather, extreme terrain, sparse aid stations, and self-reliant course requirements for experienced runners

Rugged coastal trails, steep cliffs, dense forest, and Deception Pass Bridge crossings with technical footing and scenic vistas