Ultra Running Hub Mammoth Lakes, CA, United States · Saturday, September 26, 2026
Mammoth Trail Fest
Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.
What the course asks
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, September
Regional 2001-2020 average for September — NASA POWER, grid elevation 2620 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 50km | 637 | Chad Hall · 04:07:38 | Clara Caspard · 05:03:55 |
| 2024 | 50km | 540 | Chad Hall · 04:12:47 | Sylvie Abel · 05:23:14 |
| 2023 | 50km | 417 | Nick Handel · 04:22:16 | Emkay Sullivan · 05:13:19 |
| 2022 | 50km | 234 | Chad Hall · 03:58:52 | Klaire Rhodes · 05:21:19 |
The field grew 18% between 2024 (540) and 2025 (637). 39% of the 2025 field were women.
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Course notes
- gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail.
- Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition 50 km of self-supported fuelling between aid stations.
- Hydration Vests Flask capacity for 50 km, without the bounce.
- GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.
Similar races
Other 50K trail ultras, closest in distance first.