Mountain passes around Tencin are situated in the Isère department of southeastern France, within the Grésivaudan valley near Grenoble. While Tencin itself is at a modest elevation, the surrounding region is known for its Alpine mountain ranges, including Belledonne and Chartreuse. These ranges host numerous mountain passes popular for cycling, hiking, and scenic drives. The area offers diverse terrain, from challenging climbs to routes with panoramic views.
Last updated: June 26, 2026
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Small pass in the Chartreuse, beautiful views and relatively quiet road.
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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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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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Exceptional site at the foot of the Dent de Crolle with access via a wild forest road
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Beautiful rock formation. Here is one of the steepest sections
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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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Beautiful pass between St-Pierre-de-Chartreuse and St-Pierre-d'Entremont
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The region around Tencin, particularly in the Chartreuse and Belledonne massifs, offers several popular passes for cyclists. The Col du Cucheron is an intermediate pass with magnificent views of the North Chartreuse. Another challenging option is the Col du Coq, the highest pass in the Chartreuse massif, offering views of the Dent de Crolles. For those in the Belledonne region, the Col du Barrioz provides a satisfying climb and high-quality routes for both road and mountain biking.
Yes, for experienced hikers seeking a challenge, the area offers demanding routes. The Not of the eye (Pas de l'Œil) provides access to the summit plateau of the Dent de Crolles, offering a unique and demanding hike. The Col du Coq is also known for its challenging climbs, especially on certain sections with rough road conditions, making it an adventurous experience for cyclists and hikers alike.
The mountain passes around Tencin offer diverse and breathtaking views. From the Col du Cucheron, you can enjoy magnificent vistas of the North Chartreuse. The Col du Coq provides stunning views of the Dent de Crolles. For truly panoramic scenery, the Bellefont Pass, at 1,902 meters above sea level, offers a breathtaking view of Mont Blanc and the highest peaks of the Chartreuse massif.
Beyond cycling and hiking directly on the passes, the Tencin area is excellent for various outdoor activities. You can explore numerous routes for gravel biking, including moderate to difficult loops like the 'Marcieu Pass (1,060 m) – Saint Hilaire du Touvet loop'. For hikers, there are many mountain hikes, such as the challenging 'Le pas de l'œil – Dent de Crolles loop'. Road cyclists will find a variety of cycling routes, from easy loops around the 'Basin of Le Cheylas' to difficult ones like the 'Château du Touvet – Fort Barraux loop'.
While many passes offer challenging climbs, the region also provides options for less strenuous activities. For family-friendly walks, consider exploring the lower sections or approaches to passes, which often feature gentler terrain. The Col du Cucheron, for example, has two distinct slopes, one with mountain pastures, which can offer more accessible areas for exploration. Always check specific route details for difficulty before heading out with family.
The best time to visit the mountain passes around Tencin largely depends on your planned activity. For cycling and hiking, late spring (May/June) through early autumn (September/October) generally offers the most favorable weather conditions. Higher passes, like the Col de l'Iseran (further afield but representative of high-altitude passes), are typically only open during the summer months due to snow. Always check local conditions and road closures, especially outside of peak summer.
Yes, the region is rich in natural beauty. The Not of the eye (Pas de l'Œil) is a unique geological feature that provides access to the summit plateau of the Dent de Crolles, making for a distinctive hiking experience. The Bellefont Pass is also notable for its stunning natural monument status and the panoramic views it offers of the Chartreuse massif and Mont Blanc.
Visitors frequently praise the diverse experiences offered by the mountain passes around Tencin. Many highlight the magnificent views, such as those from the Col du Cucheron overlooking the North Chartreuse, or the panoramic vistas from the Bellefont Pass. The challenging nature of climbs like the Col du Coq is often mentioned by cyclists, while the unique hiking access to the Dent de Crolles via the Not of the eye is also a popular point of interest.
While specific dog-friendly designations for each pass are not always available, many natural areas and hiking trails in the Belledonne and Chartreuse massifs are generally accessible for dogs, provided they are kept on a leash and owners follow local regulations. For example, one tip for the Not of the eye mentions dogs, implying their presence. Always ensure your dog is well-behaved and that you clean up after them to preserve the natural environment.
Yes, the wider Isère department is home to some of the most iconic cycling climbs in the French Alps. While not directly within Tencin, the legendary Alpe d'Huez climb, famous for its 21 hairpin bends and frequent inclusion in the Tour de France, is a significant challenge in the Oisans region. Another notable pass, though further afield, is the Col de l'Iseran, the highest paved mountain pass in the French Alps, offering breathtaking high-mountain scenery.
Road conditions can vary significantly between passes and even on different sections of the same pass. For instance, the Col du Coq is known to have sections with very damaged roads, particularly from the north/west side (St. Pierre), where a gravel bike might be more suitable for some parts. Other passes, like the Col du Barrioz, are noted for high-quality routes. It's always advisable to check recent conditions before embarking on a ride or drive, especially after winter or heavy rain.
Yes, for those seeking an intermediate experience, the Col du Cucheron is an excellent choice. It's described as an intermediate mountain pass with viewpoints, offering a relatively short climb from Saint-Pierre-de-Chartreuse. The two slopes provide different experiences, with one featuring mountain pastures, making it suitable for a moderate outing.


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