(S) From the Fauges car park, after Prabert, walk down the track for a few dozen metres.
Take the path ascending to the left, marked in yellow, towards "Habert d'Aiguebelle".
(1) Join theGR®549, which is shared with theGRP® Balcon des Sept Laux.
(:2) At the intersection, leave Habert d'Aiguebelle, which you can see on your left, and continue towards Lac de la Coche and Pas de la Coche.
(3). At Lac de la Coche, continue on the path to the left, following the contour line northwards, and reach Sous le Pas du Pin in about 30 minutes.
(4) Pass under Pic du Pin and cross the small Canyon du Ruisseau des Combes and its pretty waterfall. The path, still marked in yellow, now heads east and continues to climb until it reaches a small plateau at the foot of a huge scree slope.
(5). Walk along this long and tedious scree slope, trying to follow the yellow and red markings to the "Col de la Vache", the highest point of this route (altitude 2,534 metres), from where you can see Lac de Cos and Col des Sept Laux below.
(6) From the pass, descend into the valley and reach the shores of Lac du Cos.
(7) Pass a magnificent sheepfold on your right.
(8) Walk along the right-hand side of Lac Cottepens, then turn left, walking between the lakes to reach the Refuge des Sept Laux in about 45 minutes (E).