Intermediate 100mi ultramarathons in United States (West)

Point-to-point 100 mile course from Bend to Sisters with 10,900 ft of climb, scenic single-track, rugged terrain, and views beneath Mount Bachelor

Out-and-back 100-mile ultramarathon through high-altitude Rocky Mountain terrain, featuring Hope Pass, Sugarloaf, Powerline climbs, and 18,000 feet of gain

100-mile route from Flagstaff to the Grand Canyon on the Arizona Trail, with 7,000 feet of elevation gain, historic stagecoach tracks, and diverse forested high

Scenic, well-groomed gravel trails in the Central Cascade Mountains with 50-mile, 100k, and 100-mile distances; convenient crew access and onsite parking

Historic Pony Express Trail route with remote dirt roads, wild horse and antelope sightings, approximately 3,000 feet of elevation gain

Rolling singletrack loops on the scenic Pemberton Trail, desert views, and a festive atmosphere in McDowell Mountain Regional Park

Undulating course through Western States trails, with Folsom Lake and American River views across single track and roads in Northern California

USATF-certified 1.0-mile loop around Cottonwood Lake with lake views, challenging endurance events including 24 Hour Solo and 100 Mile distances

Desert singletrack and foothill paths in Estrella Mountain Regional Park, with Sonoran scenery and 100K or 100-mile options.

Certified 1.2-mile loop with gentle elevation, 95% hard surface, scenic lake and bridge crossings, and generous time limits in Henderson, Nevada

Hard-packed salt and mud flats to the Islands, with rolling terrain and significant climbs on the longer courses.

Trans-Sierra route from Olympic Valley, steep climb to Emigrant Pass, 100 rugged miles with 15,540 feet of ascent and 22,970-foot descent on historic trails