Things to see / do in the vicinity of the route:
- Petits Jardiniers (10km from the starting point): medicinal plant farm.
- Fleurs de Lyne (15km from the starting point): artisanal soap factory.
- Museé de la Grande Chartreuse (16km from the starting point): audio tour.

For more information and suggestions of things to see, visit chartreuse-tourisme.com/rsf
Marking : Signs indicating starting points are placed in each village in public welcome areas and car parks. Posts are placed at each crossroads, with a sign indicating its name and altitude, to help you follow the route. Between the posts, painted markers indicate the paths to follow or avoid. You can also use the small milestone signs to help you. Recommended map: 'Promenades et randonnées en Chartreuse' (Walks and hikes in Chartreuse).

Admission fee : Free access.

Opening : From 16/05 to 17/11 daily. Subject to favorable weather.

Step by step description : The Charmant Som is also the most easily accessible peak (see alternative) and the last Alpine pasture in Isère that still producces and sells its cheese on site. From the lodge car park, take the 'Grande Randonnée' path (French Hiking Route) through the pasture. Before you reach the other slope, turn left onto the ridge until you reach the summit cross (follow the paths made by previous hikers). The descent follows the same route in reverse.

Area : Cœur de Chartreuse