Coldwater Rumble 100 2027
The forecast arrives five days before the start.
Here you'll find the elevation profile, an estimated finish time based on your UTMB Index and details of the 15 aid stations to plan your nutrition and hydration segment by segment.
What's your time based on your UTMB?
Times estimated by the RAVIT model, learned from real ultra-trail finish times. Enter your UTMB Index (utmb.world) to get a personalized estimate.
Cut-off times and crew - Coldwater Rumble 100 · 2027
Data from the official race rules, checked for every edition. The race rules prevail. Positions are interpolated along the GPX track and are a guide, not official course marking.
What you'll find at each aid station
| Product | Gila 1km 9.0 | Rumble HQ 1km 16.2 | Gila 2km 25.1 | Rumble HQ 2km 32.3 | Rainbow Valley 1km 46.2 | Dysart 1km 57.0 | Rodeo Ranch 1km 64.5 | Rumble HQ 3km 75.2 | Rainbow Valley 2km 89.1 | Dysart 2km 99.8 | Rodeo Ranch 2km 107.3 | Rumble HQ 4km 118.1 | Rainbow Valley 3km 132.0 | Dysart 3km 142.7 | Rodeo Ranch 3km 150.2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available | available | available | available | available | available | available | available | available |
| Brand products | available | available | available | available | available | available | available | available | available | available | available | available | available | available | available |
La feuille de ton assistance pour Coldwater Rumble 100 · 2027
Ton assistance peut te voir à ces postes. Ton plan RAVIT y met tes heures, ce qu'elle te tend et la route pour y aller.
- Rumble HQ 1km 16.2
- Rumble HQ 2km 32.3
- Rodeo Ranch 1km 64.5
- Rumble HQ 3km 75.2
- Rodeo Ranch 2km 107.3
- Rumble HQ 4km 118.1
- Rodeo Ranch 3km 150.2
Recto, verso et planche d'étiquettes, en PDF : l'exemple d'une coureuse de l'UTMB.
Elevation profile
The course and its aid stations
Coldwater Rumble 100: times, aid-station stops and fuelling needs by UTMB® Index
Between a UTMB® Index of 500 and 800, the estimated finish time on this race runs from 23h31 to 13h42, and the aid-station stop budget from 1h43 to 0h33. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
Below a UTMB® Index of roughly 325, the overall cut-off of 32h00 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 23h31 | 1h43 | 9.5 | 1,411 g | 16.5 L | 11,761 mg | +8h29 |
| 550 | 21h37 | 1h24 | 7.6 | 1,297 g | 15.1 L | 10,804 mg | +10h23 |
| 600 | 19h21 | 1h07 | 5.4 | 1,161 g | 13.5 L | 9,675 mg | +12h39 |
| 650 | 17h30 | 0h55 | 3.5 | 1,050 g | 12.3 L | 8,752 mg | +14h30 |
| 700 | 16h02 | 0h46 | 2 | 962 g | 11.2 L | 8,015 mg | +15h58 |
| 750 | 14h49 | 0h39 | 0.8 | 889 g | 10.4 L | 7,410 mg | +17h11 |
| 800 | 13h42 | 0h33 | — | 822 g | 9.6 L | 6,851 mg | +18h18 |
Figures based on 60 g of carbohydrate, 700 mL of fluid and 500 mg of sodium per hour, "average" preparation and mild conditions (15–25 °C). Above 25 °C, count on roughly 900 mL/h and 700 mg/h. Carbohydrate intake is trained: 60 g/h is a floor, 90 g/h assumes a glucose-fructose blend and a gut used to it.
Other trails worth preparing for
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- Mamba 100161 km · 143 m D+ · November 6, 2026
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- Looking Glass 100K98 km · 3,190 m D+ · November 14, 2026
- Devil Dog Ultra 100k100 km · 1,820 m D+ · December 5, 2026
- Spirit of Syllamo 100152 km · 5,023 m D+ · December 12, 2026
Sources and method
- Time projection — times by UTMB Index are taken from the actual splits of runners in each level band on previous editions of this race, aid station stops included. No formula is used as long as these results exist.
- Trail nutrition — hourly targets for carbohydrate, fluid and sodium follow the commonly accepted ultra-endurance guidance. La Clinique du Coureur — Fuelling in trail running
- Course, aid stations and cut-offs — taken from the event's official rules, which prevail in case of any discrepancy. Official site — Coldwater Rumble 100
Weather for Coldwater Rumble 100
The weather for Coldwater Rumble 100 will appear here as soon as the forecast models reach that date, around five days before the start: feels-like temperature, rain, snow, wind and storms, section by section and at your passage time.
Detailed weather for Coldwater Rumble 100, hour by hour on the courseFrequently asked questions
How many checkpoints?
Coldwater Rumble 100 has 16 checkpoints: 15 aid stations and 1 checkpoint with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Rainbow Valley 2: 13.9 km and 243 m elevation gain. That's the one to load up for first.
How do I find the exact location of an aid station?
The Google Maps icon in the “Access” column opens the aid station's location: handy for planning your crew's routes.
What distance and elevation gain?
Coldwater Rumble 100 is 161 km long with 2171 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 19h21 for Coldwater Rumble 100.
What's the weather forecast?
The weather for Coldwater Rumble 100 will be published on this page around five days before the start, once the forecast models reach the race date. It will be detailed section by section: feels-like temperature, rain, snow, wind and storms.
Want to stack the odds in your favor for Coldwater Rumble 100?
In 2 minutes, RAVIT generates your complete plan: segment-by-segment time, carbs, water and sodium at every aid station, printable roadbook.
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