Bighorn Trail Run

The Bighorn Trail Run is a challenging ultra-running event held in the rugged Bighorn Mountains near Dayton, Wyoming. It offers four race distances—100 miles, 52 miles, 32 miles, and 18 miles—over two days, showcasing steep climbs, technical terrain, and dramatic elevation changes totaling over 20,500 feet of ascent and descent. The course traverses remote single-track trails, jeep roads, and gravel paths through the Bighorn National Forest, with potential wildlife encounters including elk, moose, and bears. Known as one of the top 10 most difficult ultras in the U.S., the race emphasizes endurance, preparation, and community support, with well-stocked aid stations and dedicated volunteers fostering a spirited, Western hospitality atmosphere. Visit the organization's website for the most recent information.