Best mountain passes around Voiron are located at the foot of the Chartreuse massif in the Isère department. This region provides access to various mountain passes, offering diverse experiences for cyclists, hikers, and those seeking scenic drives. The passes feature varied terrain, from moderate climbs to high-altitude viewpoints, showcasing the surrounding Alpine landscape.
Last updated: April 28, 2026
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Very pleasant pass to climb, not too steep a slope, well marked all the way.
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End of the climb and arrival on the plateau
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Arriving from Cessieu, I made a small detour via Voissant then the remaining 4 km to the Col des Mille Martyrs. Easy climb, no cars on this early Sunday afternoon and a very beautiful forest upon arrival. Bucolic viewpoints as a bonus during the climb. The descent to Saint-Geoire-en-Valdaine is perfect. Super rolling surface and moderate slope allow you to reach 50 km/h effortlessly. Paradise exists, it is in Chartreuse.
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Located above the Bannettes alpine pasture at 1,752 meters, the ol d'Hurtières offers multiple panoramas of the Chartreuse and Belledonne massifs, and the eastern slope of the Vercors.
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Located above the Bannettes alpine pasture at 1,752 meters, the Col d'Hurtières offers multiple panoramas of the Chartreuse and Belledonne massifs, and the eastern slope of the Vercors.
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At the foot of Mollard de la Grande Vache, this pass offers spectacular views of the Mont-Blanc massif on one side and the Grande Sure on the other.
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Small pass above Voreppe with two completely different climbs. From Voreppe (6.5%) or from Saint-Laurent-du-Pont (<2%)
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For cyclists, the Col des Mille Martyrs offers a refreshing and relatively easy climb, followed by a pleasant descent towards Miribel-les-Echelles. Another popular choice is Placette Pass, which features a 5.3 km ascent from Voreppe with an average gradient of 6.4%.
The Col d'Hurtières, located at 1,752 meters above the Bannettes alpine pasture, provides extensive panoramas of the Chartreuse, Belledonne, and Vercors massifs. Additionally, the Grande Vache Pass offers dramatic views of the Mont-Blanc massif on one side and the Grande Sure on the other.
The Col de Porte, situated at 1,326 meters in the Chartreuse Regional Natural Park, is a year-round destination. In winter, it's a family-friendly ski resort for Nordic and alpine skiing, snowboarding, and tobogganing. In summer, it's a popular starting point for hiking, mountain biking, and nature walks, offering magnificent landscapes at the foot of Chamechaude.
Yes, the Col de Porte is known as a family-friendly destination, offering diverse recreational activities suitable for all ages, both in winter and summer. For hiking, you can find various routes around Voiron, including easy options like the 'Nice view of the church – Notre-Dame-de-Vouise loop from Marais du Puits d'enfer' which is 5.29 km long. You can explore more family-friendly hiking options in the Hiking around Voiron guide.
The best time to visit depends on your preferred activities. For hiking and cycling, late spring to early autumn (May to October) generally offers pleasant weather. For winter sports like skiing, the Col de Porte is ideal from December to March, known for its exceptional snow cover.
Beyond cycling and hiking, the region around Voiron offers a variety of outdoor activities. You can find numerous gravel biking routes, such as the 'Via chartreuse – Canal de l'Herretang loop from Saint-Joseph-de-Rivière' (22.29 km, easy). For more options, check out the Gravel biking around Voiron guide, the Hiking around Voiron guide, and the Running Trails around Voiron guide.
Yes, for those seeking a challenge, the Route de Chalais, leading to the Monastery of Notre-Dame de Chalais, is known for its very high percentages and challenging climb. The ascent to Placette Pass from La Buisse also features winding sections with challenging gradients up to 6.5%.
The Placette Pass serves as a natural boundary between the Jura and Chartreuse massifs. While the summit itself might not have prominent landmarks beyond a few houses and a bus stop, the journey offers a pleasant, often bucolic, experience with varying terrain and nice views over the valley, acting as a gateway to the Chartreuse region.
Visitors appreciate the diverse experiences offered by the mountain passes. Many enjoy the refreshing and easy climbs like the one at Col des Mille Martyrs, often noting the beautiful forest and bucolic viewpoints. The spectacular panoramic views from high-altitude passes like Col d'Hurtières are also a major draw, showcasing the grandeur of the Alpine landscape.
While specific details for each pass vary, the Col de Porte is easily accessible and located approximately 25 km from Voiron and just 20 minutes from Grenoble, suggesting good road access for parking. For other passes, it's generally recommended to check local information for parking availability, as public transport options might be limited, especially for higher-altitude or more remote locations.
The Chartreuse Regional Natural Park, where many of these passes are located, generally welcomes dogs on trails, often requiring them to be on a leash to protect wildlife and livestock. It's always best to check specific trail regulations before heading out, but many hiking routes around the passes can be enjoyed with your dog.
The Col de la Placette is situated at an altitude of 582 meters (or 587 meters according to some sources). From Voreppe, the ascent covers 5.40 km with an average gradient of 6.43% and a maximum of 8.5%. From La Buisse, the ascent is more winding, featuring both easy and more challenging sections up to 6.5%.


See even more epic mountain passes by checking out these guides around Voiron: