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runner on a path in the beaufortain massif
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28th August 2023


With its unique landscapes, its friendly and alpine atmosphere, the TDS is more than ever a world-class event.


145 KM

Elevation Gain

9176 M+

Race Start

Courmayeur - 23:50

Max Allowed Race Time

44 Hours


Beautiful, technical, wild, demanding, there are not enough adjectives to describe the TDS. Acronym for "Sur les Traces des Ducs de Savoie" (following the footprints of the Dukes of Savoie), the TDS links the Aosta Valley to the Savoie, allowing you to discover the villages of the Tour du Mont-Blanc and the mountains that surround them. To cross this unique playground is to walk where history and mountains, the technical terrain and the kindness of its inhabitants blend together.

In addition to its traditional departure from Courmayeur, the new edition of the TDS takes you through the Beaufortain region winding through the most amazing places of the massif such as Pas d'Outray, with its breathtaking view of the Pierra Menta and Grand Mont - two mythical places for ski mountaineering. Not to mention Hauteluce with its typical hamlets and its breathtaking view of Mont-Blanc. With its unique landscapes, its friendly and alpine atmosphere, the TDS is more than ever a world-class event and the adventure of a lifetime. It is up to you to come and write the history of this spectacular race.


A closer look at the course

Participate in the TDS

All the information you need to know before starting an extraordinary adventure.

rules and regulations

Rules and Regulations

Check out the official TDS rules and regulations including registration process and fees, mandatory equipment, assistance policy, runner commitment and much more.

Registration conditions

Registration for the general public will be possible starting January 24th at 3pm CET, and will be on a first-come, first-served basis.

Repatriation insurance

Each competitor must have a personal accident insurance covering search and rescue costs in France and Italy.

Mandatory equipment

Check the list of mandatory equipment and the heatwave or extreme cold kits that can be activated depending on the weather conditions.

Medical Certificate

Each competitor must upload the medical certificate on their dashboard before May the 31st 2023.

Dive deep into the heart of the race

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