XTERRA O-SEE Ultra Trail - 25k Team Duo 2026
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 - XTERRA O-SEE Ultra Trail - 25k Team Duo · 2026
| Aid station | Cum. km | Cum. D+ | Seg. km | Seg. D+ | Seg. D- | Crew | Cut-off | Access |
|---|---|---|---|---|---|---|---|---|
| Arrivée | 25.2 | 1,100 m | 25.2 | 1,100 m | 1,100 m | — | Sat 06:30 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.
Elevation profile
The course and its aid stations
XTERRA O-SEE Ultra Trail - 25k Team Duo: 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 2h59 to 2h10, and the aid-station stop budget from 0h04 to 0h02. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 2h59 | 0h04 | — | 179 g | 2.1 L | 1,492 mg | +5h01 |
| 550 | 2h49 | 0h03 | — | 169 g | 2 L | 1,406 mg | +5h11 |
| 600 | 2h39 | 0h03 | — | 159 g | 1.9 L | 1,323 mg | +5h21 |
| 650 | 2h31 | 0h02 | — | 151 g | 1.8 L | 1,257 mg | +5h29 |
| 700 | 2h24 | 0h02 | — | 144 g | 1.7 L | 1,198 mg | +5h36 |
| 750 | 2h17 | 0h02 | — | 137 g | 1.6 L | 1,141 mg | +5h43 |
| 800 | 2h10 | 0h02 | — | 130 g | 1.5 L | 1,085 mg | +5h50 |
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
- Pumpkin Hollar 25K25 km · 300 m D+ · October 17, 2026
- Fort Collins - Half Marathon22 km · 460 m D+ · October 18, 2026
- Javelina Jackass 31k31 km · 322 m D+ · October 31, 2026
- Coldwater Trail 25k25 km · 619 m D+ · November 1, 2026
- HOKA Pacific Trails California by UTMB - 25K®25 km · 667 m D+ · November 15, 2026
- FOURmidable 35k35 km · 1,122 m D+ · February 13, 2027
- Lost Lake 25K25 km · 954 m D+ · March 6, 2027
- Desert RATS Trail Running Festival - 21K21 km · 642 m D+ · April 11, 2027
- The Canyons Endurance Runs - 25K25 km · 810 m D+ · April 23, 2027
Sources and method
- Time projection — les temps par cote sont repris des passages réels des coureurs de chaque tranche sur les éditions précédentes de cette course, arrêts aux ravitaillements compris. Aucune formule n'intervient tant que ces résultats existent.
- 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 — XTERRA O-SEE Ultra Trail - 25k Team Duo
Weather for XTERRA O-SEE Ultra Trail - 25k Team Duo
Section-by-section forecasts for XTERRA O-SEE Ultra Trail - 25k Team Duo, calculated at the estimated passing time: feels-like temperature, rain or snow, wind and thunderstorms. Three models — AROME (Météo-France), ICON (DWD) and ECMWF IFS — served from the finest to the farthest-reaching.
Forecast, not guaranteed: in the mountains a model describes a grid of several hundred meters, not the slope you're on.
Données météo : Météo-France (AROME), DWD (ICON), ECMWF (IFS) — CC BY 4.0, via Open-Meteo
Frequently asked questions
How many checkpoints?
XTERRA O-SEE Ultra Trail - 25k Team Duo 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?
XTERRA O-SEE Ultra Trail - 25k Team Duo is 25 km long with 1100 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 2h39 for XTERRA O-SEE Ultra Trail - 25k Team Duo.
What's the weather forecast?
RAVIT publishes the weather for XTERRA O-SEE Ultra Trail - 25k Team Duo section by section: feels-like temperature, rain or snow, wind and storms, at the estimated passage time. Forecasts come from AROME (Météo-France), ICON (DWD) and ECMWF IFS, refreshed several times a day.
Want to stack the odds in your favor for XTERRA O-SEE Ultra Trail - 25k Team Duo?
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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