Description of the route

From Valgrisenche, continue along the paved road that leads to Bonne. Go past this village and ignoring the dirt road on the right for Arp Vieille, you come to another crossroad near Rognettaz Désot and Damon, where you can leave the car.
Ignore the branch of the road that goes down to Usellières, take the branch on the right to Grand’Alpe. Continue along the dirt road signposted 14 and follow it until it ends. From here, continue on the right along trail 14, until you come to Lago San Grato.