TDS - Sur les Traces des Ducs de Savoie
Courmayeur → Chamonix
149
km
9,100
D+
2,665
max alt.
6
ITRA pts
Course
The TDS takes wild and technical trails on the southern side of the Mont-Blanc massif. This 149km ultra trail race is renowned for its mountain character, exposed passages, and 9,100m of elevation gain.
Race profile
TDS - Sur les Traces des Ducs de Savoie is a 149 km trail race with 9,100 m of elevation gain, located in Courmayeur → Chamonix. The next edition is scheduled for 26 August 2026.
The course reaches a maximum altitude of 2,665 m. The race is rated 6 ITRA points and features Montagne, Alpin terrain. 1 distances are available for runners.
Find all official information on the race website.
Frequently asked questions
How long is the TDS?
The TDS is 149 km with 9,100 m of elevation gain, on the southern side of the Mont-Blanc massif.
Is the TDS more technical than the UTMB?
Yes, the TDS is known for more exposed and technical passages than the UTMB, with wild alpine trails.