Description of the route

From Nus take the road direction Saint Barthélemy, after going through Les Fabriques, you turn left at a hairpin bend onto the road that leads to Praz. From here you continue on foot along a trail that is sometimes a footpath and sometimes an un-made road until you reach the Alpine pastures of Praterier. As you continue on through the valley on trail no. 13, you go past trail no.1 on the right leading to Tsa de Pierrey, and come to another junction near the Les Crottes pastures. You ignore the right-hand branch which leads to Fenêtre de Tsan, and continue to the left until you reach the Reboulaz Bivouac.