Mammoth Lakes, California · Trail
The Mammoth 2026
2025·2026
Friday, October 2, 2026 at 9:00 AM GMT-7
The race states that its 2026 route is still pending Forest Service approval, and that it will update the cut-offs once the final course and aid stations are set.
Registration is open through August 31, 2026.
Distances
- Distance
- 218 mi (351 km)
- Vert gain
- 31,091 ft (9,500 m)
- Cutoff
- 109 hr
WSER 2027 qualifier (sub-100:00)
| Distance | Vert gain | Cutoff | Notes |
|---|---|---|---|
| 218 mi (351 km) | 31,091 ft (9,500 m) | 109 hr | WSER 2027 qualifier (sub-100:00) |
Every year
- 2026October 2, 2026 · upcoming
- 2025September 26, 2025 · completedJimmy Elam 45:16:02 · Rachel Entrekin 46:50:45