UTMB Index ultramarathons in California, United States

Rugged 100-mile route through the San Gabriel Mountains' primitive wilderness, featuring rough terrain and scenic, largely untouched backcountry

Mountain routes near Los Angeles featuring Big Bear Lake views, Sugarloaf Mountain ascents, and descents into Siberia Canyon

Rugged ascent from Calistoga's Palisades Trail to Mount St. Helena, technical trails, Robert Louis Stevenson State Park, panoramic views, signature Maze feature

Rugged Sierra Nevada foothills, historic gold-rush routes, steep canyons, and challenging scenic terrain through the birthplace of mountain ultras

Ancient sand dunes, sandy trails, mossy forest floors, and a scenic loop along Clearwater Creek and the Athabasca in Fort Assiniboine Sandhills Wildland

Point-to-point course from Cal Memorial Stadium to Skyline High School featuring 18,000ft of elevation, redwood forests, exposed ridges, and lakefront trails.