Starts: From Chef-lieu of St Colomban, go to the Pierre Bozon path (in front of the city hall), in order to go to the Roches’ hamlet.
Descriptive: A track which lead at the mountain pastures of the Roches’ valley. The most picturesque is to go up from the old path which lead to a long torrent on his left (right bank). Arrived at the Plâtre footbridge, come back by the other bank by going down by shady path between the trees to the Roches. If you want to reach St Colomban, left the path then continue on a wide path.