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Park in the hiking car park at the edge of the hamlet of Perquelin in the commune of Saint-Pierre de Chartreuse. This car park is located along the forest track at the end of the hamlet: do not go past the forest gate if it is open.
(S/E) Follow the signposted forest track until you come to a small stream. Cross it and follow the yellow hiking signs.
(1) Turn right towards “Fontaine Noire”. When you reach a sign for “Source du Guiers”, turn left in the opposite direction (the sign also mentions “Le Prayet”). You’ll come to a forest track.
(2) Turn left. Leave the track a few dozen metres further on to join a path that winds upwards to the right. From this point, the route is no longer signposted. Follow the switchbacks until you reach a cave which you can visit on the way (note that the route also passes in front of an arch).
(3) At the cave, take the path that continues to the right of it, then climb up a narrow gully via a path with tight hairpin bends. Reach the top of this gully.
(4) Leave the main path by taking another path on the left, marked by a cairn. Then follow this path as it runs along the cliff. Look out for red dot markings and follow them.
(5) Do not take the path that climbs up the chimney on the right at the end of the cliff; instead, follow the path marked with red dots which branches off to the left at the foot of this chimney. Here you will find the entrance to the Bellefont rock field: follow the markings carefully so as not to get lost until you reach theGR®. On this section, there are a few easy climbing sections to negotiate.
(6) Follow theGR® to the left and head for the Bellefont hut,
(7) Follow the signs for “Col de la Saulce”.
(8) Once at the pass, turn left towards “Perquelin”. Continue downhill, following the right bank of the Ruisseau de Bellefont, then cross it.
(1) Carry on to the right to reach the Perquelin car park (S/E).
Visorando Member
Moderate 
Very difficult 
