Runners in New Mexico race through rugged terrain while leading pack burros, reviving an Old West tradition.

Backcountry runners in New Mexico are taking on the challenge of racing with pack burros, a tradition that pays homage to Old West mining history. These races require runners to lead burros carrying a saddle, pick, pan, and shovel through rugged terrain, ranging from 3 to 30 miles. The sport, now an official state-heritage race in Colorado, emphasizes the partnership between runner and burro and has expanded to various locations across the U.S.