Mountain Ultra Trail - MUT Challenge by UTMB® 2027
This page is generated independently by RAVIT. RAVIT is not affiliated with UTMB Group SAS, the race's official organizer.
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 - Mountain Ultra Trail - MUT Challenge by UTMB® · 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 | Waterworkskm 7.4 | George Damkm 14.1 |
|---|---|---|
| Water | available | available |
| Brand products · Näak | available | available |
La feuille de ton assistance pour Mountain Ultra Trail - MUT Challenge by UTMB® · 2027
L'assistance n'est autorisée sur aucun poste de cette course.
Elevation profile
The course and its aid stations
Mountain Ultra Trail - MUT Challenge by UTMB®: 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 3h11 to 2h04, and the aid-station stop budget from 0h03 to 0h01. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 3h11 | 0h03 | — | 191 g | 2.2 L | 1,592 mg | +2h49 |
| 550 | 2h54 | 0h03 | — | 174 g | 2 L | 1,452 mg | +3h06 |
| 600 | 2h40 | 0h02 | — | 160 g | 1.9 L | 1,334 mg | +3h20 |
| 650 | 2h30 | 0h02 | — | 150 g | 1.7 L | 1,247 mg | +3h30 |
| 700 | 2h20 | 0h02 | — | 140 g | 1.6 L | 1,168 mg | +3h40 |
| 750 | 2h12 | 0h01 | — | 132 g | 1.5 L | 1,098 mg | +3h48 |
| 800 | 2h04 | 0h01 | — | 124 g | 1.4 L | 1,033 mg | +3h56 |
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.
Measured on the 2026 edition: the field checkpoint by checkpoint
536 starters, 3% DNF rate, 3 timed checkpoints.
| Segment | km | Median | Middle half | Measured | Median passage | Still ranked |
|---|---|---|---|---|---|---|
| Start Challenge → Waterworks | 7.1 | 52 min | 46 min – 58 min | 533 | 52 min | 533 |
| Waterworks → Trail Kiosk | 23.4 | 2 h 45 | 2 h 20 – 3 h 12 | 527 | 3 h 35 | 527 |
| Trail Kiosk → Finish | 25.4 | 16 min | 14 min – 18 min | 520 | 3 h 51 | 520 |
“Median passage” is elapsed time from the start, not a clock time: the clock time depends on the edition.
Where runners drop out. Trail Kiosk (7) · Waterworks (6) · Start Challenge (3) out of 16 total DNFs.
RAVIT record from the official timing of the 2026 edition, data from September 20, 2026.
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In the 2027 ranking
Mountain Ultra Trail - MUT Challenge by UTMB® is 25 km and 1,065 m of elevation gain, that's 36 km-effort: category XS, among 157 races in 2027. Its time limit of 6 h requires a minimum speed of 4.2 km/h: rank 71 out of 147 of the widest cut-off times in XS.
XS trails 2027: 25 to 44 km-effort
Similar effort in 2027
- Trail du Saint Jacques - Rando 28km · 36 km-effort
- Trail du Saint Jacques - 20K - Les Chibottes · 36 km-effort
- MOUNTAINMAN Nesselwang - M-Trail · 35 km-effort
Other trails worth preparing for
Mountain Ultra Trail - MUT Challenge by UTMB® over the years
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 — Mountain Ultra Trail - MUT Challenge by UTMB®
Weather for Mountain Ultra Trail - MUT Challenge by UTMB®
The weather for Mountain Ultra Trail - MUT Challenge by UTMB® 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 Mountain Ultra Trail - MUT Challenge by UTMB®, hour by hour on the courseFrequently asked questions
How many checkpoints?
Mountain Ultra Trail - MUT Challenge by UTMB® 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 Finish: 11.3 km and 470 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?
Mountain Ultra Trail - MUT Challenge by UTMB® is 25 km long with 1065 m of elevation gain.
How long to finish?
With a UTMB® Index of 600 (average runner), the estimated time is around 2h40 for Mountain Ultra Trail - MUT Challenge by UTMB®.
What's the weather forecast?
The weather for Mountain Ultra Trail - MUT Challenge by UTMB® 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 Mountain Ultra Trail - MUT Challenge by UTMB®?
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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