Trail de la Saint Lau'Run 2027
The forecast arrives five days before the start.
Here you'll find the elevation profile and an estimated finish time based on your UTMB Index.
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 - Trail de la Saint Lau'Run · 2027
| Aid station | Cum. km | Cum. D+ | Seg. km | Seg. D+ | Seg. D- | Crew | Cut-off | Access |
|---|---|---|---|---|---|---|---|---|
| Arrivée | 24.0 | 789 m | 24.0 | 789 m | 786 m | — | Sun 01:30 PM |
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
Aid station contents not documented.
La feuille de ton assistance pour Trail de la Saint Lau'Run · 2027
Les règles d'assistance de cette course ne sont pas encore connues : tu marqueras tes rendez-vous toi-même.
Recto, verso et planche d'étiquettes, en PDF : l'exemple d'une coureuse de l'UTMB.
Elevation profile
The course and its aid stations
Trail de la Saint Lau'Run: 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 2h56 to 1h57, and the aid-station stop budget from 0h04 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 | 2h56 | 0h04 | — | 176 g | 2.1 L | 1,465 mg | +2h04 |
| 550 | 2h42 | 0h03 | — | 162 g | 1.9 L | 1,347 mg | +2h18 |
| 600 | 2h30 | 0h03 | — | 150 g | 1.7 L | 1,248 mg | +2h30 |
| 650 | 2h21 | 0h02 | — | 141 g | 1.6 L | 1,172 mg | +2h39 |
| 700 | 2h12 | 0h02 | — | 132 g | 1.5 L | 1,097 mg | +2h48 |
| 750 | 2h04 | 0h02 | — | 124 g | 1.4 L | 1,035 mg | +2h56 |
| 800 | 1h57 | 0h01 | — | 117 g | 1.4 L | 973 mg | +3h03 |
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
Trail de la Saint Lau'Run is 24 km and 789 m of elevation gain, that's 31 km-effort: category XS, among 156 races in 2027. Its time limit of 5 h requires a minimum speed of 4.8 km/h: rank 96 out of 146 of the widest cut-off times in XS.
XS trails 2027: 25 to 44 km-effort
Similar effort in 2027
- Oh Meu Deus - Oh Meu Deus 20K · 31 km-effort
- Volvic Volcanic Experience - Trail Experience Volcanique · 31 km-effort
- IV ATOM ISASA TRAIL XTREM - Media Maratón 22 km · 31 km-effort
Other trails worth preparing for
- Saint Eusèbe - Trail du Four à Pain15 km · 539 m D+ · October 31, 2026
- Moontrail by RCBJ - Tour du plateau36 km · 1,081 m D+ · October 31, 2026
- Valbonne - 15km-night15 km · 400 m D+ · October 31, 2026
- COTTANCE - 20km-night20 km · 750 m D+ · October 31, 2026
- Orgères - Trail découverte - 15km nocturne14 km · 169 m D+ · October 31, 2026
- Volvic - 16km-night17 km · 648 m D+ · October 31, 2026
- Bouaye - La Lanterne24 km · 190 m D+ · October 31, 2026
- Saint Eusèbe - Trail Panoramic27 km · 956 m D+ · October 31, 2026
- Courzieu - 25km-night25 km · 1,160 m D+ · October 31, 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 — Trail de la Saint Lau'Run
Weather for Trail de la Saint Lau'Run
The weather for Trail de la Saint Lau'Run 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 Trail de la Saint Lau'Run, hour by hour on the courseFrequently asked questions
How many checkpoints?
Trail de la Saint Lau'Run has 1 checkpoint: 1 checkpoint with undocumented contents. Details are in the two tables above.
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?
Trail de la Saint Lau'Run is 24 km long with 789 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 2h30 for Trail de la Saint Lau'Run.
What's the weather forecast?
The weather for Trail de la Saint Lau'Run 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 Trail de la Saint Lau'Run?
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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