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UTMB®: How to prepare well for your race in 2025

UTMB®: How to prepare well for your race in 2025

16 Jul. 2025

UTMB® : Bien préparer sa course en 2025

To prepare your trip to Chamonix for the UTMB, it will be important to know the aid station and support conditions during the race, but also to anticipate the weather conditions in the Chamonix area in August. Finally, sleep management will be key during the race, and you will need to have planned your rest phases in advance.

The weather in Chamonix in August

The end of August in the Chamonix valley tends to enjoy generally mild weather on average. The weather conditions you encounter on the ground will determine what clothing to wear during the race and how to manage hydration during the effort. It will therefore be important to regularly check the forecasts in order to fine-tune your preparation and be ready for any eventuality.

Aid stations and support during the race

During the race, the aid station and support conditions are important to understand. You will need to identify the location of the various aid stations along the course and their type (liquid-only or liquid + solid). The authorised support during the race also gives you the opportunity to receive help from someone at certain points on the course, allowing you to access spare clothing, for example, or additional supplies. It will be important to fully understand the rules around this support in order to optimise it, and also to organise it according to the logistical constraints of moving between the various authorised points.

Sleeping during the UTMB

Managing sleep during a long-distance event is always a delicate matter. This is even more true for a demanding event like the UTMB. Sleeping during the race is therefore a necessity that must be planned, anticipated, and organised. It will also be important to manage sleep during the period before the race as well as throughout the entire training phase in order to prepare your body for fragmented sleep on race day. To find out more:

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