4.3
(16)
159
hikers
14
hikes
Mountaineering routes around Mont-Saint-Martin are situated within the Chartreuse Massif, characterized by its limestone peaks, deep valleys, and extensive forests. The terrain offers varied ascents, from challenging rock faces to forested paths leading to elevated viewpoints. This region provides a diverse landscape for mountaineering, with significant elevation changes and panoramic vistas.
Last updated: October 18, 2026
4.0
(2)
18
hikers
12.5km
07:01
1,020m
1,020m
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
18
hikers
3.74km
02:29
410m
410m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

5.0
(1)
14
hikers
11.6km
03:56
510m
510m
Moderate mountaineering route. Good fitness required. Mostly accessible paths. Sure-footedness required.
5.0
(2)
14
hikers
13.7km
04:54
610m
610m
Moderate mountaineering route. Good fitness required. Mostly accessible paths. Sure-footedness required.
3.0
(1)
9
hikers
7.78km
05:39
830m
830m
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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A bit of gas and a beautiful view of the city
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The climb to the charming Som from the Col de Porte is always a treat. There are some very steep sections, but the view at the top is worth it. Be careful on the descent: uneven road, tight bends, cars.
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Highest summer cheese dairy, perched in the middle of the Charmant Som mountain pasture. Well, okay, it's not really the season...
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Dominating the valley, the Orgeval oratory offers a magnificent view. When the weather permits, the Mont-Blanc massif can be seen in the distance.
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This beautiful single track joins the crests of Montfromage. The forest is dense but allows a glimpse of the surrounding landscapes and, in the distance, the Rochers de Chalves.
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Charmant Som (1867 m) is one of the 3 dominant peaks of St Pierre de Chartreuse, and the most accessible by bike from the Col de Porte. Upstairs you will enjoy a beautiful panorama. The Charmant Som, in addition to being the most easily accessible summit, is the last mountain pasture in Isère that makes and sells its cheese on site. The ascent to the Chalet de Charmant Som from Col-de-Porte is a climb in the Grenoble region. It has a length of 5.5 kilometers and an ascent of 364 vertical meters with a slope of 6.7% on average, which implies a difficulty level of 336. The summit of the ascent is located at 1671 meters above sea level.
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Culminating at 1,867 meters, the Charmant Som is an emblematic summit of the Chartreuse massif. From the inn of the same name, accessible by car, the ascent is made without major difficulty. At the top, the panorama is spectacular!
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The routes in this region are primarily categorized as moderate to difficult. There are 5 moderate routes and 9 difficult routes available, offering varied challenges for experienced mountaineers.
Mountaineering routes around Mont-Saint-Martin are generally geared towards more experienced hikers due to significant elevation changes and challenging terrain. While there are no easy routes listed, some moderate options might be suitable for families with older, experienced children. Always check the route details and consider the fitness level of all participants.
The Chartreuse Massif, where Mont-Saint-Martin is located, is characterized by its distinctive limestone peaks, deep valleys, and extensive forests. You can expect varied ascents, from challenging rock faces to forested paths, and open alpine pastures, all offering significant elevation changes and panoramic vistas.
The area is highly rated by the komoot community, with an average score of 4.75 stars from 11 reviews. Mountaineers often praise the diverse landscape, the challenging ascents, and the expansive views of the surrounding massif.
Yes, many routes around Mont-Saint-Martin are circular. For example, the Piénom (1615 m) – Charmant Som summit loop from Chamechaude is a moderate 13.75 km route, or the Col de la Chavanette Signpost – Charmant Som loop from Col de Porte, which is a moderate 8.3 km option.
Beyond the routes themselves, the region offers several impressive passes and peaks. You can explore the Col de Porte (1326 m) or the Clémencières Pass. For peaks, consider visiting Chamechaude or the Charmant Som summit.
The best time for mountaineering in the Chartreuse Massif is typically from late spring to early autumn (May to October) when the weather is more stable and trails are clear of snow. Always check local weather forecasts and trail conditions before heading out, especially at higher elevations.
The mountaineering routes around Mont-Saint-Martin are generally moderate to difficult, with no routes specifically classified as 'easy'. Beginners should consider starting with the shorter moderate routes, such as the Oratoire d'Orgeval – Col de la Chavanette Signpost loop from Chamechaude, and ensure they have appropriate gear and experience.
Access to trailheads in the Chartreuse Massif can be challenging via public transport, as many routes start from smaller villages or mountain passes. It's advisable to check local bus schedules for services to key starting points like Saint-Martin-le-Vinoux or Le Sappey-en-Chartreuse, but a car often provides the most flexibility.
Parking is typically available in the villages and near popular trailheads such as Saint-Martin-le-Vinoux, Le Sappey-en-Chartreuse, and Chamechaude. Always look for designated parking areas and respect local regulations, especially during peak seasons.
For a more challenging experience, consider the Le Néron loop from Saint-Martin-le-Vinoux, a difficult 12.5 km trail with significant elevation gain, or the Piénom (1615 m) – Charmant Som summit loop from Chamechaude, a moderate but longer 13.75 km route.
The shortest mountaineering route listed is the L'Écoutoux loop from Le Sappey-en-Chartreuse, a difficult 3.7 km path that navigates through varied terrain.


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