36K Xterra Trail Vallée de Joux 2026
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 2 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 - 36K Xterra Trail Vallée de Joux · 2026
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 | km 11.5km 11.5 | km 24km 24.0 |
|---|---|---|
| Water | available | available |
| Brand products | available | available |
Elevation profile
The course and its aid stations
36K Xterra Trail Vallée de Joux: 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 5h10 to 3h23, and the aid-station stop budget from 0h11 to 0h04. 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 390, the overall cut-off of 6h30 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 5h10 | 0h11 | — | 310 g | 3.6 L | 2,580 mg | +1h20 |
| 550 | 4h43 | 0h09 | — | 283 g | 3.3 L | 2,358 mg | +1h47 |
| 600 | 4h21 | 0h08 | — | 261 g | 3 L | 2,176 mg | +2h09 |
| 650 | 4h02 | 0h06 | — | 242 g | 2.8 L | 2,018 mg | +2h28 |
| 700 | 3h48 | 0h05 | — | 228 g | 2.7 L | 1,900 mg | +2h42 |
| 750 | 3h36 | 0h05 | — | 216 g | 2.5 L | 1,801 mg | +2h54 |
| 800 | 3h23 | 0h04 | — | 203 g | 2.4 L | 1,689 mg | +3h07 |
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
- Ascona-Locarno - 24K25 km · 1,353 m D+ · October 24, 2026
- Ascona-Locarno - 42K42 km · 2,673 m D+ · October 24, 2026
- Fribourg - 34km-night34 km · 1,072 m D+ · December 12, 2026
- Les Courses du Mont-Terrible - Trail d'Outremont52 km · 2,923 m D+ · April 17, 2027
- Les Courses du Mont-Terrible - Relais 70K - Relais 237 km · 1,945 m D+ · April 17, 2027
- Les Courses du Mont-Terrible - Relais 70K - Relais 135 km · 1,909 m D+ · April 17, 2027
- Les Courses du Mont-Terrible - La Terrible23 km · 947 m D+ · April 17, 2027
- Les Courses du Mont-Terrible - Trail de Pietchiesson36 km · 1,593 m D+ · April 18, 2027
- Trail Noble Contree - Trail NBC26 km · 1,431 m D+ · May 1, 2027
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 — 36K Xterra Trail Vallée de Joux
Weather for 36K Xterra Trail Vallée de Joux
The weather for 36K Xterra Trail Vallée de Joux 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 36K Xterra Trail Vallée de Joux, hour by hour on the courseFrequently asked questions
How many checkpoints?
36K Xterra Trail Vallée de Joux has 3 checkpoints: 2 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 Arrivée: 12.8 km and 176 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?
36K Xterra Trail Vallée de Joux is 37 km long with 1909 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 4h21 for 36K Xterra Trail Vallée de Joux.
What's the weather forecast?
The weather for 36K Xterra Trail Vallée de Joux 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 36K Xterra Trail Vallée de Joux?
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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