Le Grand Trail des Chamois 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 7 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 - Le Grand Trail des Chamois · 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 | Carrière de Roissiatkm 9.8 | Mont Myon Allerkm 14.9 | Esses de Treffortkm 29.5 | Château de Treffortkm 39.0 | Cuisiatkm 46.7 | Mont Myon Retourkm 54.0 | Route de Valressonkm 62.1 |
|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available |
| Brand products | available | available | available | available | available | available | available |
Elevation profile
The course and its aid stations
Le Grand Trail des Chamois: 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 11h21 to 7h14, and the aid-station stop budget from 0h38 to 0h14. 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 430, the overall cut-off of 13h00 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 11h21 | 0h38 | 2 | 681 g | 8 L | 5,679 mg | +1h39 |
| 550 | 10h25 | 0h31 | 2 | 625 g | 7.3 L | 5,211 mg | +2h35 |
| 600 | 9h41 | 0h26 | 2 | 581 g | 6.8 L | 4,838 mg | +3h19 |
| 650 | 9h01 | 0h22 | 2 | 541 g | 6.3 L | 4,510 mg | +3h59 |
| 700 | 8h19 | 0h19 | 2 | 499 g | 5.8 L | 4,160 mg | +4h41 |
| 750 | 7h48 | 0h16 | 2 | 468 g | 5.5 L | 3,903 mg | +5h12 |
| 800 | 7h14 | 0h14 | 2 | 434 g | 5.1 L | 3,617 mg | +5h46 |
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
- Festival Des Templiers - Integrale des Causses62 km · 2,973 m D+ · October 16, 2026
- Festival Des Templiers - Rock'Voizine48 km · 1,923 m D+ · October 16, 2026
- Festival Des Templiers - ENDURANCE TRAIL100 km · 4,309 m D+ · October 16, 2026
- Mascareignes75 km · 3,832 m D+ · October 16, 2026
- Trail de Bourbon106 km · 6,252 m D+ · October 16, 2026
- Trail du Haut Clunysois - La Saint Cyr45 km · 1,466 m D+ · October 17, 2026
- Trail en Côte-Rôtie - L'AOC46 km · 2,290 m D+ · October 17, 2026
- Metis Trail54 km · 2,654 m D+ · October 17, 2026
- Trail en Côte-Rôtie - L'AOC en Duo46 km · 2,290 m D+ · October 17, 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 — Le Grand Trail des Chamois
Weather for Le Grand Trail des Chamois
The weather for Le Grand Trail des Chamois 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 Le Grand Trail des Chamois, hour by hour on the courseFrequently asked questions
How many checkpoints?
Le Grand Trail des Chamois has 8 checkpoints: 7 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 Esses de Treffort: 14.6 km and 654 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?
Le Grand Trail des Chamois is 68 km long with 3529 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 9h41 for Le Grand Trail des Chamois.
What's the weather forecast?
The weather for Le Grand Trail des Chamois 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 Le Grand Trail des Chamois?
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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