Ultra Running Hub Cool, CA, United States · Saturday, December 12, 2026
Fixed Distance 50K
Doomsday
54 days away
50 km Distance
not publishedn/a Climbing
2.5 est Grit · Entry level
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
Time limit 9 hours
10:48 min/km average. Firm. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. About average for a 50K. Measured against 1058 races of the same distance. Cut-off calculator →
Field size ~80 Mid-sized. Company early, well spread out by halfway.
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, December
Daytime high 12°C
Night low 3°C
Rainfall Showers likely
Daylight 9 h 30 m of light
Regional 2001-2020 average for December — NASA POWER, grid elevation 304 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 50km | 80 | Calvin Frink · 05:21:44 | Sylvie Abel · 04:37:52 |
| 2024 | 50km | 71 | Samuel Cooper · 05:33:44 | Sandra Sperry · 06:03:10 |
| 2023 | 50km | 48 | Danny Murphy · 05:13:07 | Nicolette del Sarto · 06:03:02 |
The field grew 13% between 2024 (71) and 2025 (80). 33% 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.