Trail ultramarathons in United States (Southwest)

Rocky out-and-back course through Bear Valley and Lake Spaulding, steep ascents on Signal Peak loop, challenging terrain with rugged segments

Technical singletrack and rolling fire roads through shaded oak groves and exposed hillsides, with sweeping Bay Area views and a challenging elevation profile

High-altitude trails above 10,000 feet through alpine meadows, ghost towns, and mining relics, with sweeping views of the South Park Valley and Decalibron peaks

102.5-mile loop in Colorado's San Juan Mountains, 33,000 feet of climbing, 13 mountain passes, technical terrain, summit of Handies Peak at 14,048 feet

Demanding 50-mile course through Uinta-Wasatch-Cache National Forest, trails and minor roads, mandatory pack weight, 26-hour limit, scenic mountain terrain

Night race on runnable jeep roads and technical terrain at Twin Mountains Offroad Park, with frequent loops and hot, humid conditions.

Trail route through towering coastal redwoods, stream canyons, meadows, pine and oak forests, ridges, and San Lorenzo river crossings

High-altitude 50-mile out-and-back over dirt, rocks, and mud with challenging climbs, fast descents, and views of Leadville’s historic mining district

Night trail running on flat, fast routes through Usery Mountain Regional Park, featuring Chain Fruit, Lost Sheep, Channel, and Blevins Trails

Night trail route through rugged hills and dry southern terrain under a vast starry sky at South Llano River State Park

Repeated 10K pine-forest circuit at Rocky Hill Ranch, with singletrack, rolling hills, intermittent shade, and long-format options from 50K to 200K.

Steep, technical 100-mile route through Colorado’s rugged San Juan Mountains, renowned for extreme difficulty and a strict no-frills ethos

101-mile loop in Colorado’s Sawatch Range with 23,500 feet of climbing, high alpine passes, ghost towns, and sweeping ridges on the Continental Divide

Alpine Loop course through historic mining ghost towns, reaching 12,930 feet at California Pass and descending to Silverton, total gain 4,400 feet

Steep ascents and dramatic descents along the Harding Truck Trail in the Santa Ana Mountains, featuring expansive vistas and a 50K distance.

Mountain trails from John L Harvey Stadium to Snow Valley Peak and Tahoe Rim Trail, featuring Ash Canyon climbs, remote aid stations, and Ultra Lounge finish

Scenic alpine 10K loop with 1,546 feet of vertical gain per lap, technical trails through aspen groves and meadows at Powderhorn Mountain

Challenging 50K ultra crossing all four Aspen Snowmass mountains on singletrack and dirt roads, featuring demanding elevation and scenic mountain terrain.

4-mile loop completed every hour, elimination on missed cutoff, continuing until a single runner remains

Point-to-point mountain course along the Wasatch Front, featuring high alpine ridgelines, remote backcountry, wild meadows, and rocky, exposed sections