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Bighorn Trail Run
One of America's Most Challenging Mountain Ultras
An epic mountain ultra through the Bighorn National Forest with 100-mile, 52-mile, 32-mile, and 18-mile distances.
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Race date: June 19, 2026 at 5:00 AM.
About
The Bighorn Mountain Wild and Scenic Trail Run is one of the most difficult mountain ultras in the United States, featuring 100-mile, 52-mile, 32-mile, and 18-mile distances through the Bighorn National Forest. The 100-mile distance is a qualifier for both the Western States Endurance Run and Hardrock Hundred Mile Endurance Run, with over 20,500 feet of ascent and 20,750 feet of descent across 76 miles of technical single-track trail, 16 miles of rugged jeep road, and 8 miles of gravel road. The event operates under a special use permit with the Bighorn National Forest and finishes at Scott Bicentennial Park in Dayton. Registration opens October 15 for the 100M and 52M, and January 5 for the 32M and 18M.
Location
| Venue | Scott Bicentennial Park |
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Course
| Surface | Trail |
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| Course type | Point to point |
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| Elevation gain | 6250 m |
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| Weather notes | Mid-June in the Bighorn Mountains is highly variable: 0 to 25 C (32 to 77 F) depending on elevation. Snow possible at high passes. Be prepared for all conditions. |
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Race profile
| First held | 1993 |
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| Average runners | 600 |
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Registration
| Price | $40 to $60 |
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| Participant limit | 800 |
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Contact
| Organizer | Bighorn Trail Run |
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