The walk starts from the Plan de l’Arc car park, at the end of the Route des Euchets.
(S/E) Cross the Plan de l’Arc play area and head to the lower station of the Plan du Repos chairlift.
(1) Leave the chairlift on your left, ignore a path coming from the left and continue north-east along the main path.
(2) At the Putétruit sheepfolds, take a path on the left and head to a footbridge over the Torrent des Moulins.
(3) Cross the Torrent des Moulins and head south-east towards the Plan Pigeux sheepfolds. On this section, the gradient becomes steeper.
(4) At Plan Pigeux, follow the path ahead of you heading south-east.
(5) At a junction of paths, turn left and begin a steep climb with numerous hairpin bends. This will take you to the Passage du Retour.
(6) Continue eastwards towards Lac de Retour. Descend slightly and head off to the left to reach the lake, overlooked by the Mont Pourri glacier.
(7) The return journey follows the same route in the opposite direction to the Plan d’Arc car park (S/E).