February ultramarathons in Nevada, United States

10-mile desert loop with steep climbs and descents, packed dirt and rocky terrain, elevations from 1903 to 2333 feet, expansive mountain and desert views

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

Remote Arizona Strip loop on ATV trails through rocky canyons and Joshua tree country, with steep climbs, rugged footing, and wide-open views