The trail is on a stone path that was built in the Middle Ages by the monks from the Chartreuse de Mélan. This path linked the village of Taninges to the Praz de Lys pastures 1,000m higher up. There is a shorter alternative without the section around the Lac de Roy. The “Montée des Pavés” is an unmissable race, held every year at the end of July, with two trail-running distances (8 or 12 km) and a walk to choose from !