In Saint-Laurent-du-Pont, take the Route de Fourvoirie (D520B) towards Saint-Pierre-de-Chartreuse. After about one kilometre, take the small road that climbs to the right (Route Forestière de la Charmette). Continue straight on to the end of the road where you will find the Currière car park.
(S/E) Take the road opposite, which is closed by a barrier. About 100 metres after the barrier, take the path on the right (post with a yellow arrow): this is the Sentier des Agneaux. It winds through the woods, with the slope becoming steeper at times. A few gaps in the trees offer glimpses of the monastery. Continue along this path.
(1) When you reach the top of the hill, the path turns right. After a short descent, the slope levels out and crosses a fairly flat section, still in the woods.
(2) When you reach the point called "la Salle à manger" (the dining room), take the forest track on the right that climbs into the forest towards the Col des Charmilles. Keep following the main track. The slope is fairly constant throughout. After a while, the track turns into a path that winds its way up through the forest. At this point, you are almost at the Col des Charmilles.
(3). From there, you can see the Grande Sure, which you can reach by continuing straight ahead across the meadow. For our hike, turn right onto a barely visible path that leads to the Crêtes des Charmilles. There are white markings, but they are not very visible. The path is not very well marked here. Follow the ridge, where gaps in the trees offer views to the east and west.
(4) At the end of the ridge, take a small path that branches off to the left and descends into the rocks for a few metres, then back into the woods. This path winds downhill and is very poorly marked in places. The slope is sometimes steep and the path is uneven, so caution is advised. Follow this path all the way down through the woods, following the yellow markings on some of the trees.
(5) At the end of the descent, after passing a few fallen trees across the path, the trail joins a wider grassy track that marks the end of the steep descent. Take this track to the right (northeast).
Continue straight ahead on the grassy track, which turns into a dirt forest track. Pass a stone with a Latin inscription "Sapinus Terminoru" (Borne du Sapin des Termes on the map). Continue straight ahead on this gently sloping track. It then joins the Chemin de Nonne.
(6) Arrive at the Belvédère de Nonne, which offers a beautiful view of Saint-Laurent-du-Pont and the Guiers valley. Continue along the track, which winds down a gentle slope to the car park (S/E).
especially on the ridge trail and on the descent where vegetation has reclaimed its rights.