TDS – The Traces of the Dukes of Savoy

The TDS (les Traces du Duc de Savoie) is a high‑alpine, technical trail race presented within the HOKA UTMB Mont Blanc festival. At approximately 145 km with around 9,500 m of ascent, the route links the Aosta Valley to Savoie and visits villages along the Tour du Mont‑Blanc, offering sustained mountainous terrain and technical footing. The official race page lists a late‑evening departure from Courmayeur (start time 23:50 local time), launching competitors into prolonged mountain conditions that demand strong navigation and endurance. The organiser describes the course as beautiful, wild and demanding, with a strong local and alpine atmosphere.

The UTMB race hub supplies maps, GPX files, course profiles and time charts together with race regulations, equipment lists and registration information for TDS. The event is presented under the UTMB World Series branding and sits within the Mont‑Blanc festival window (24–30 August 2026); the official site also gives registration dates and related policies. A maximum allowed race time of 44 Hours 55 Minutes is stated on the race page, and the hub highlights notable sectors such as the Beaufortain, Pas d'Outray and Hauteluce for their scenic views. These features combine to position TDS as a distinctive, technical long‑distance mountain race within the UTMB programme.