Ushuaia - CHALLENGE 50K 2026
Your index is enough · arrival time and first checkpoints free
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 - Ushuaia - CHALLENGE 50K · 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 | GLACIAR MARTIALkm 12.1 | ARAKURkm 28.5 | OLIVIA RIVER 1km 37.5 | ALARKENkm 45.2 | USHUAIAkm 51.9 |
|---|---|---|---|---|---|
| Water | available | available | available | available | available |
| Brand products | available | available | available | available | unavailable |
| Hot meal | unavailable | unavailable | unavailable | unavailable | available |
La feuille de ton assistance pour Ushuaia - CHALLENGE 50K · 2026
L'assistance n'est autorisée sur aucun poste de cette course.
Elevation profile
The course and its aid stations
Ushuaia - CHALLENGE 50K: 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 9h09 to 5h39, and the aid-station stop budget from 0h17 to 0h06. 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 320, the overall cut-off of 13h00 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 9h09 | 0h17 | 1.5 | 549 g | 6.4 L | 4,572 mg | +3h51 |
| 550 | 8h22 | 0h14 | 1.5 | 502 g | 5.9 L | 4,184 mg | +4h38 |
| 600 | 7h40 | 0h11 | 1.5 | 460 g | 5.4 L | 3,835 mg | +5h20 |
| 650 | 7h05 | 0h10 | 1.5 | 425 g | 5 L | 3,541 mg | +5h55 |
| 700 | 6h28 | 0h08 | 1.5 | 388 g | 4.5 L | 3,235 mg | +6h32 |
| 750 | 6h02 | 0h07 | 1.5 | 362 g | 4.2 L | 3,020 mg | +6h58 |
| 800 | 5h39 | 0h06 | 1.5 | 339 g | 4 L | 2,826 mg | +7h21 |
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
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 — Ushuaia - CHALLENGE 50K
Weather for Ushuaia - CHALLENGE 50K
The weather for Ushuaia - CHALLENGE 50K 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 Ushuaia - CHALLENGE 50K, hour by hour on the courseFrequently asked questions
How many checkpoints?
Ushuaia - CHALLENGE 50K has 5 checkpoints: 5 aid stations. Details are in the two tables above.
What's the longest segment without aid?
The one leading to ARAKUR: 16.4 km and 0 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?
Ushuaia - CHALLENGE 50K is 52 km long with 2747 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 7h40 for Ushuaia - CHALLENGE 50K.
What's the weather forecast?
The weather for Ushuaia - CHALLENGE 50K 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 Ushuaia - CHALLENGE 50K?
RAVIT calculates your race plan at your UTMB Index: segment time, carbs, water and sodium at each aid station.
Your index is enough · arrival time and first checkpoints free