(S) From the Cabane Chanrion, let yourself slide down to the rhythm of the marmots' whistles. After about 200 m heading south, you will reach a crossroads of paths
(1) Take the path on the left and join the Route de Mauvoisin towards Itro Neu. Take it on the left and continue downhill until you reach a large building just before two small lakes.
(2) Leave the road here and turn almost 180° onto a wide, almost horizontal path. After a long traverse, you will reach the dam on the Ruisseau de la Dranse de Bagnes.
(3) Turn again almost 180° to the right to begin a long climb up the Vallon d'Ayace, following the left bank of a stream flowing down from the Crête Sèche Glacier. Reach the foot of the pass and finish the climb with a final rocky and very steep section. Use your hands to help you at times to reach the Col de Crête Sèche.
(4) First descend into a ravine to Plan De Sabbia.
(5) Continue across alpine meadows to reach the Crête Sèche refuge (E), your destination for the day.