TDS

TDS

The organiser gave 145 km and 9,500 metres of climb with a maximum time of 44 hours 55. The race climbed straight out of Courmayeur to Maison Vieille and the Arête du Mont-Favre, past Lac Combal to the Col Chavannes, at 2,580 metres the highest point, at 21 km. From La Thuile and the Petit-Saint-Bernard at 37 km it dropped to Séez and Bourg-Saint-Maurice at 51 km.

The second half was the harder one. Fort de la Platte, the Passeur de Pralognan (2,554 m) at 62 km, the Cormet de Roselend, the Col de la Sauce and La Gittaz led down to Beaufort, at 739 metres the lowest point of the course, at 92 km. The organiser describes the Beaufortain section, with the Pas d’Outray’s view of the Pierra Menta and the hamlets of Hauteluce. After the Girotte dam, Le Signal and Les Contamines at 123 km came the Col de Tricot (2,117 m) at 130 km, Bellevue and the descent through Les Houches to Chamonix.

This page belongs to the 2026 TDS. A midnight start meant the field ran into Tuesday morning before the first big valley, and the organiser’s timetable put the back of the field in Chamonix on Wednesday evening, after two nights out. On Livebib the runner’s own link shows family and friends the position on the course line, the distance covered and an updating finish estimate, with no account or app. In the long stretches without signal the position is carried forward and marked as estimated.