Ultra Running Hub Goodyear, AZ, United States · Saturday, January 16, 2027
Coldwater Rumble 100 Km Race
Calculated from 100 km alone — the organiser has not published an elevation profile. Read 5.0 as a floor, not a verdict.
What the course asks
DUV results for the 2026 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, January
Regional 2001-2020 average for January — NASA POWER, grid elevation 398 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2026 | 100km | 49 | Tim Vail · 08:57:14 | Brittany Poor · 12:00:06 |
| 2025 | 100km | 34 | Matthew Bradner · 09:30:09 | Lucie Rathbun · 09:20:33 |
| 2024 | 100km | 39 | Jacob (Jake) Jackson · 10:09:15 | Laura Noll · 12:15:02 |
The field grew 44% between 2025 (34) and 2026 (49). 31% of the 2026 field were women.
DUV results for the 2026 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
The Aid Station
Course-specific beta from the community
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.
Gear for this race
Chosen for 100 km of trail.
- Trail Running Shoes 100 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
- Hydration Vests Flask capacity for 100 km, without the bounce.
- Headlamps 100 km almost certainly means running into the night.
- Accessories Chafe and blisters end more 100 km races than fitness does.
Similar races
Other 100K trail ultras, closest in distance first.