Start: car park at the Col de Marcieu, in the commune of Saint-Bernard du Touvet, in the Chartreuse massif.
(S/E) Follow the small tarmac road for 400 m; this is on the right 100 m after the pass (towards Saint-Hilaire-du-Touvet), with signs halfway along opposite the housing estate.
(S/E) At the end of this, a track branches off to the north-east (barrier) and heads into a wooded area. After a wide circular path to the left, head north along the path on the right which crosses the ski runs and the ski lift. Join a forest track, then, after crossing another track, reach a scree slope (short, steep climb) topped by a young fir forest (landmark for the descent).
(2) Begin a long south-westerly traverse, then a few switchbacks through the forest to emerge into a small clearing (known as "L’Alpette", alt. 1,458m) which offers a striking view of the vast rocky cirque where the ascent route can be made out.
(3) Continue north to quickly reach the foot of the cliff, where the path climbs into the cirque via rocky steps (wide, cut-out steps), secured by railings and wooden stakes for most of the way.
At the top of the cirque, a horizontal traverse beneath a rocky overhang leads to the Cross marking the pass, after rounding a final spur.
(4) Begin the return journey by following the route in reverse to the car park at Col de Marcieu (S/E).
) and to see some chamois.