(S) Set off from Base Camp heading north-north-west along the stony path. To do this, follow the sharedGRP® routes of the Tour du Pays de Chambeyron and the Fortified Frontier. After a good kilometre, reach the path to the Stroppia Waterfall on the left.
(1) Turn left (west) towards the crossing of the stream flowing down from Stroppia. After a winding climb with a rapid gain in altitude, take the path carved into the rock. This section is narrow and exposed. The gradient is steep and the 600-metre climb is over a short distance. You will reach Lac Neira (often dry) above the waterfall.
(2) Continue along theGRP® path westwards and then north-westwards. You will reach another GRP® junction.
(3) Take the path on the right, known as the Petit Tour du Chambeyron. Stay on this path.
(4) At a fork, continue due north, leaving the path to the Barenghi Bivouac on your right. Climb the Col de la Gypière. The entire ascent takes place beneath the peaks of the Brec de Chambeyron on the left.
(5) Head west then north down a winding path to reach Lac des Neuf Couleurs.
(6) Continue heading due west to reach Lac Long and follow the lake on your left.
(7) Complete the descent westwards to reach the Refuge du Chambeyron (E).