UTFS 66KM 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 5 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 - UTFS 66KM · 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 | VP2km 18.9 | VP3km 28.9 | VP4km 38.1 | VP5km 46.6 | VP6km 59.0 |
|---|---|---|---|---|---|
| Water | available | available | available | available | available |
| Brand products | available | available | available | available | available |
La feuille de ton assistance pour UTFS 66KM · 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.
Recto, verso et planche d'étiquettes, en PDF : l'exemple d'une coureuse de l'UTMB.
Elevation profile
The course and its aid stations
UTFS 66KM: 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 10h10 to 6h11, and the aid-station stop budget from 0h22 to 0h08. 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 |
|---|---|---|---|---|---|---|
| 500 | 10h10 | 0h22 | — | 610 g | 7.1 L | 5,084 mg |
| 550 | 9h21 | 0h18 | — | 561 g | 6.5 L | 4,672 mg |
| 600 | 8h25 | 0h15 | — | 505 g | 5.9 L | 4,205 mg |
| 650 | 7h46 | 0h12 | — | 466 g | 5.4 L | 3,885 mg |
| 700 | 7h06 | 0h10 | — | 426 g | 5 L | 3,554 mg |
| 750 | 6h37 | 0h09 | — | 397 g | 4.6 L | 3,312 mg |
| 800 | 6h11 | 0h08 | — | 371 g | 4.3 L | 3,090 mg |
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.
In the 2027 ranking
UTFS 66KM is 67 km and 2,444 m of elevation gain, that's 91 km-effort: category M, among 124 races in 2027. Its time limit is not yet published: minimum speed unknown.
M trails 2027: 75 to 114 km-effort
Similar effort in 2027
- Granite Peaks Ultra 50k · 91 km-effort
- Eryri by UTMB® - Eryri 50K · 91 km-effort
- Istria 100 - 69K · 91 km-effort
Other trails worth preparing for
- Javelina 100k97 km · 1,053 m D+ · October 31, 2026
- Coldwater 50k52 km · 1,293 m D+ · November 1, 2026
- New York Marathon42 km · 209 m D+ · November 1, 2026
- Mt Laguna Trail Marathon43 km · 938 m D+ · November 1, 2026
- Tunnel Hill 5081 km · 182 m D+ · November 7, 2026
- Mountain Masochist 100k101 km · 3,268 m D+ · November 7, 2026
- Mountain Masochist 5081 km · 2,311 m D+ · November 7, 2026
- Lake Chabot 50K49 km · 1,896 m D+ · November 7, 2026
- Mt. Tam 50k48 km · 2,005 m D+ · November 7, 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 — UTFS 66KM
Weather for UTFS 66KM
The weather for UTFS 66KM 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 UTFS 66KM, hour by hour on the courseFrequently asked questions
How many checkpoints?
UTFS 66KM has 7 checkpoints: 5 aid stations and 2 checkpoints with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to VP2: 18.9 km and 609 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?
UTFS 66KM is 67 km long with 2444 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 8h25 for UTFS 66KM.
What's the weather forecast?
The weather for UTFS 66KM 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 UTFS 66KM?
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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