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7 - Le Grand Som on trail
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Description
A true challenge in the heart of Chartreuse! Covering 22 km with a positive elevation gain of 1600 m, this trail is reserved for the boldest. Technical and demanding, it’s designed for those who love to take on the mountains. Ready to rise to the challenge?
Discover Trail Route No. 6 in the Chartreuse, a perfect course for those seeking a balanced challenge. This varied route combines enjoyable climbs and descents, with a few technical sections to spice up the adventure. All set in stunning landscapes, offering breathtaking views of the Chartreuse. An ideal trail to immerse yourself in nature while pushing your limits.
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Enjoy all the trail routes directly on your smartphone with several useful features:
*Track your real-time location along the route
*Access detailed trail descriptions during your outing and download the data for offline access
*Benefit from detailed IGN maps and add your timing results to the routes.
Technical Information
Altimetric profile
Starting point
Points of interest
Date and time
- From 01/05/2026 to 30/11/2026
Additional information
Updated by
Chartreuse Tourisme - 24/09/2025
www.chartreuse-tourisme.com/
Report a problem
Open period
From 01/05 to 30/11.
Subject to favorable snow and weather conditions.
Contact
Phone : 04 76 88 62 08
Email : info@coeurchartreuse-tourisme.com
Website : espacestrail.run/fr/raidlight
Guidebook with maps/step-by-step
After descending to the bottom of the station, you'll reach the Porte de l'Enclos (entrance to the Grande Chartreuse domain). You’ll embark on a long ascent of 1000m+ while passing by the Museum and the Monastery Convent (please respect the tranquility of the area!).
After an initial forest section along the chapels of Saint-Bruno and Casalibus (without entering), you’ll cross the first meadows at the Col de la Ruchère before tackling more exposed sections at Petit Som.
Next, you’ll find yourself on the plateau of Habert de Bovinant before reaching the summit of Grand Som. The descent starts with some tricky sections at Racapé, followed by a pleasant sequence of switchbacks from the Col des Aures (optional detour to the col du Cucheron for a view of the Entremont valley).
At the foot of this trail, you’ll make a brief ascent before switching to the slope of La Scia and returning to the base area via a scenic path.
