Open-source 100-mile race records
Ultra race information. One place.
Schedules, maps, cutoffs, crew access, tracking, and results—organized into one public race record.
Free · No account · Open source · MIT
First complete record · 2026
Bighorn 100
100 miles out-and-back through Wyoming's Bighorn Mountains, Dayton up to the Jaws turnaround.
- Distance
- 100.0 mi
- Vert
- 20,500 ft
- Cutoff
- 35 h · disputed
- Station passes
- 22
Interactive course · Drag to rotate
Course grade
¼ mi avg
- Flat <5%
- Moderate 5–10%
- Steep >10%
Loading terrain