Bighorn Trail Run

The Bighorn Trail Run is a challenging ultra-running event held in the rugged Bighorn Mountains near Dayton, Wyoming. Offering four race distances—100, 52, 32, and 18 miles—over two days, it features a remote, technical out-and-back course through the Bighorn National Forest. The 100-mile race includes over 20,500 feet of ascent and descent across single-track trails, jeep roads, and gravel paths.

Known as one of the top 10 toughest ultras in the U.S., the course demands endurance through steep climbs, difficult terrain, mud, and variable mountain weather. Participants may encounter wildlife such as elk, bears, and mountain lions. The event emphasizes community, support from dedicated volunteers, and preserving the natural beauty of the area. Visit the organization's website for the most recent information.