To reach the starting point, take the small road leading up to Salvaris, either from Rochetaillée or from Saint-Chamond. Just before Salvaris, there is a car park on the left (watch out for ruts).
(S/E) Take the path leading uphill from the car park.
(1) Keep the pylons on your right, ignore a path on your left and continue climbing a little further, along a path that quickly turns left and becomes fairly flat. Continue until you reach a sharp bend.
(2) Take a sharp left-hand bend onto the path which descends quite steeply (the path is made of large stones, so it’s best to wear sturdy shoes). During the descent, there are several viewpoints accessible on the right
Reach the Roche de la Rivoire and enjoy its superb view of the Pilat mountains and the Valla en Gier valley below (be careful of the sheer drop! There is no barrier).
(3) Then continue down the path; the forest eventually opens out, leading to a telecoms mast.
(4) Turn sharply left towards the hamlet of Péalussin, cross the hamlet and head uphill to the left.
(5) At the junction with a forest track, continue straight on along the path which continues to climb and turns left a little further up; continue climbing.
(6) As you approach the summit, turn right; pass the summit and descend for about a hundred metres.
(7) At this point (low point), you will see a parallel path a few metres to the right; turn left onto this parallel path, then immediately turn right onto a steeply descending track (caution: slippery rocks). Continue the descent to the forest road and turn left onto the road, which will take you slightly uphill back to the starting point (S/E).