Best mountain passes around La Flachère are situated in a region characterized by its mountainous terrain, offering access to the Chartreuse and Belledonne massifs. The area features diverse landscapes, from forested slopes to high-altitude viewpoints. This geographic setting provides numerous opportunities for exploring mountain passes.
Last updated: June 26, 2026
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The cross of the Aulp du seuil is located at 1825m above the cirque and marks the entrance to the high plateaus.
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Beautiful surroundings and a wonderful place to start this (and other) hikes. Les Ateliers du Cucheron is a fantastic hotel/gite with very friendly staff. I'll definitely be back to discover more hikes.
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Warning: The climb from the east side is extremely steep! An average gradient of around 10% over 9-10 km.
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From Saint Laurent du Pont, a demanding 14km climb, with many sections at over 10%. It is divided into three parts: 9km of irregular ascent (6 to 11.5% /100m) to the junction for the Chartreuse Monastery. Then 2km of flat terrain to the foot of St Pierre de Chartreuse and finally a very steep climb (several sections at +12% /100m) to the Col de Cucheron. A pass not to be underestimated! 25 degrees at St Laurent = 15 degrees at the top of the pass and its very shaded slopes. Dress accordingly.
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Climb to the Col du Barioz via Les Fontaines and Le Charpieux. A technical climb after Les Perrins requires vigilance and some pushing. Please note: Passage after Les Perrins may be blocked during the summer by an electric sheep fence.
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Very good and quite accessible as a pass. Be careful of overtaking cars.
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Great hike! Make sure you have good shoes with crampons because some slopes are a bit slippery. Magnificent view at the top.
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Among the most popular mountain passes in the region are Granier Pass, known as a classic route into the Chartreuse massif, and Col du Cucheron, which offers magnificent views of the North Chartreuse. Another highly appreciated pass is Bellefont Pass, located at 1,902 meters, providing breathtaking views of Mont Blanc.
Several passes provide excellent views. Col du Cucheron offers magnificent panoramas of the North Chartreuse. Bellefont Pass is renowned for its breathtaking views of Mont Blanc and the highest peaks of the Chartreuse massif. Additionally, the ascent to Granier Pass via Saint-Baldoph also offers superb panoramas.
While specific difficulty ratings for individual passes aren't always explicit for beginners, passes like Marcieu Pass are described as having a 'very quiet road' from Saint-Bernard du Touvet, suggesting a potentially less challenging experience. The region generally offers a variety of passes catering to different preferences, so checking route details for specific climbs is recommended.
The best time to visit is generally during the warmer months, from late spring to early autumn, when the passes are clear of snow and weather conditions are most favorable for outdoor activities. This allows for full enjoyment of the views and routes.
Some passes may have different conditions in winter. For example, Marcieu Pass hosts a small ski resort in winter, indicating that it is accessible and active during the colder months, though conditions will be specific to winter sports rather than typical hiking or cycling.
While not all passes have direct facilities, Marcieu Pass is noted to have 'facilities'. For Bellefont Pass, you can get water on the south side at a cabin at the foot of the source. For other passes, it's advisable to check local information or plan to bring your own supplies.
The region around La Flachère offers diverse outdoor activities. You can find numerous cycling routes, such as the 'Marcieu Pass – Chartreuse Viewpoint loop' or 'Barraux – Old La Flachère station loop', which can be explored via the Cycling around La Flachère guide. For gravel biking, options like the 'Allevard – View of the Flumet basin loop' are available in the Gravel biking around La Flachère guide. Running enthusiasts can find trails like the 'Enversin Waterfall – Enversin ford crossing loop' in the Running Trails around La Flachère guide.
While not directly at the passes, Granier Pass offers the possibility to descend towards the vineyards of Apremont and around Lac Saint-André, which could provide opportunities for swimming or lakeside relaxation.
Col du Barrioz, located in the Belledonne region, is the highest of the Balcons de Belledonne passes at 1038m and offers satisfying climbs and high-quality routes. Marcieu Pass is also described as 'little passing' and 'very quiet', making it a good option for those seeking a more tranquil experience.
Visitors frequently highlight the superb panoramas and breathtaking views, especially of Mont Blanc and the Chartreuse massif. The diverse landscapes, from forested slopes to high-altitude viewpoints, and the variety of routes catering to different preferences are also highly appreciated. Many enjoy the classic routes and the sense of continuing into beautiful natural areas.
Yes, for cycling, there are circular routes available. For instance, the 'Marcieu Pass – Chartreuse Viewpoint loop' can be started from Saint-Georges or La Buissière. You can find more details and other circular options in the Cycling around La Flachère guide.


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