Bighorn Trail Run
Sheridan, United States • 19-20 Jun 2026
Event Overview
The Bighorn Trail Run is a multi-distance trail and ultra-running event held in the Bighorn Mountains. The 2026 race dates are June 19-20. The event was created to increase public awareness of the Bighorn Mountains' natural beauty and terrain.
Race Distances
The event offers four distances:
- 100 Mile
- 52 Mile
- 32 Mile
- 18 Mile
Registration opens on different dates for the distances. The 18-mile race is listed as full for 2026, with waitlists available.
Course and Terrain
The courses are described as remote and rugged, traversing the Little Bighorn and Tongue River areas of the Bighorn National Forest. The terrain includes steep climbs, technical single-track trails, rugged jeep roads, and sections with potential mud. The 100-mile course is an out-and-back route with significant elevation change. Wildlife such as elk, deer, moose, black bear, and rattlesnakes may be encountered.
Event Support
The event is operated under a special use permit with the Bighorn National Forest. It features aid stations staffed by volunteers. Participants should prepare for extreme and changing mountain weather conditions. The course is marked, but markings can occasionally be disturbed by wildlife. Visit the organization's website for the most recent information.