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Park at the car park at the end of the road leading to Perquelin.
(S/E) From the car park, take the obvious forest road that climbs in a general easterly direction.
(1) At a large crossroads, look for the sign indicating the sources of the Guiers, head north-east towards the Col de la Saulce and follow the yellow markings.
(2) Leave the forest road and take a path that winds north towards Col de la Saulce. Please note: the start of the path is very discreet. Reach Col de la Saulce. Join theGR®® "Tour de Chartreuse" path.
(3) Take it to the right and you will reach the Col de Bellefond trail junction, near the shepherd's chalet.
(4) Take the path on the right, leaving the Col de Bellefond trail, which winds up a steep slope on the left.
TheGR®® winds through the Chaos de Bellefond, over sharp limestone pavement that is sometimes easy, sometimes more technical, in a wild and varied environment. Reach the junction ofthe GR®® and the trail leading to the Dent de Crolles.
(5) Head south towards the summit of Dent de Crolles. The last few metres can be covered very close to the cliff, with an incredible view of the Alps.
Arrive at the summit. The view is spectacular, stretching as far as the Matterhorn to the north-east, Mont Blanc and, to the south, the Grand Veymont and Mont Aiguille. To the north are the peaks of Chartreuse.
(6) Retrace your steps down the same route to the previous crossroads.
(5) Turn left onto theGR®®. Descend in a south-westerly direction. A few aerial passages add to the beauty of this trail. Once you have completed the difficult sections, enjoy the Trou du Glaz.
(7) Continue the descent and take the last hairpin bends to reach the Col des Ayes.
(8) Take the forest road on the right, which descends due north. Follow the red and yellow markings ofthe GRP®® du Tour de Chartreuse to reach the Perquelin car park (S/E).
Visorando member
Moderate 
Difficult 
