Organiser
Coldwater Rumble
Goodyear, Arizona, United States
16–17 Jan 2027
Loop races at Estrella Mountain Regional Park in Goodyear, Arizona, from a 5 mile to a 100 mile.
Train for this raceAbout
The Coldwater Rumble, also called the Coldwater Hundred, runs at Estrella Mountain Regional Park in Goodyear, Arizona, with 100 mile, 100K, 50K, 20 mile, 10 mile and 5 mile races. The 100 mile covers 101.3 miles with 8,687 ft of gain on a mix of red and blue loops.
The 100 mile has a 32 hour limit and all races finish by Sunday afternoon.
Distances
| Name | Distance | Gain | Loss | Vert / km | Min altitude | Max altitude | Start | Start location | Finish | Course | Cutoff | Terrain | Technicality | Aid stations | Badges | Entry fee |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 Mile | 163 km | 2,648 m | — | 16.2 m/km | — | — | 16 Jan 2027 07:00 America/Phoenix | Estrella Mountain Competitive Track | Estrella Mountain Competitive Track | Multi loop | 32 h | Desert | — | — | — | — |
| 100K | 103.3 km | 1,673 m | — | 16.2 m/km | — | — | 16 Jan 2027 07:15 America/Phoenix | Estrella Mountain Competitive Track | Estrella Mountain Competitive Track | Multi loop | 31 h | Desert | — | — | — | — |
| 50K | 51.8 km | 908 m | — | 17.5 m/km | — | — | 16 Jan 2027 07:30 America/Phoenix | Estrella Mountain Competitive Track | Estrella Mountain Competitive Track | Multi loop | 31 h | Desert | — | — | — | — |
| 20 Mile | 32.2 km | 568 m | — | 17.6 m/km | — | — | 16 Jan 2027 08:00 America/Phoenix | Estrella Mountain Competitive Track | Estrella Mountain Competitive Track | Loop | 30 h | Desert | — | — | — | — |
| 10 Mile | 15.3 km | 279 m | — | 18.2 m/km | — | — | 16 Jan 2027 08:30 America/Phoenix | Estrella Mountain Competitive Track | Estrella Mountain Competitive Track | Loop | 7 h | Desert | — | — | — | — |
| 5 Mile | 8.05 km | 169 m | — | 21.0 m/km | — | — | 16 Jan 2027 08:45 America/Phoenix | Estrella Mountain Competitive Track | Estrella Mountain Competitive Track | Loop | 7 h | Desert | — | — | — | — |
100 Mile terrain notes
Two Red loops (10 mi) and three Blue loops (27 mi). Max elevation 1,449 ft.
100K terrain notes
One Red loop and two Blue loops.
50K terrain notes
One Yellow loop and one Blue loop.
20 Mile terrain notes
Single-day 20 mile.
10 Mile terrain notes
Short desert race.
5 Mile terrain notes
Shortest distance.
Registration
- Status
- Open
Links
Notes
100 mile $300 until 14 August, $320 until 14 December, $340 until 11 January, $360 race week. Registration closes Monday 11 January at 11:59 pm MT.