Bourg - Chesod - Maen-Valtournenche - Perrères - Breuil

Trail 02_S20 makes a long traverse along the sun-facing slopes of the Valtournenche, linking the village of Bourg at 1,078 m with Maen at 1,991 m. The 17.4 km route climbs 913 m through the municipalities of Torgnon and Villeneuve, passing from the lower meadows and vineyards of the valley floor to the open pastures of mid-mountain, with views toward the Matterhorn massif closing the valley head. Rated E (CAI scale), it is open from April to October according to the regional trail registry — a long accessible season that reflects its moderate altitude range.