4.3
(409)
3,191
riders
223
rides
Mountain biking around Crolles offers diverse terrain nestled in the Grésivaudan Valley, situated between the Belledonne and Chartreuse massifs in the French Alps. The region features a wide array of mountain bike trails, from progressive paths suitable for beginners to technical and demanding routes for experienced riders. Riders can explore varied itineraries that include both thrilling descents and challenging sections across its mountainous landscape.
Last updated: June 17, 2026
5.0
(4)
62
riders
18.3km
02:11
740m
740m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.0
(3)
58
riders
26.8km
03:12
1,260m
1,260m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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4.5
(11)
45
riders
37.3km
04:00
1,180m
1,180m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
5.0
(1)
17
riders
35.0km
03:46
1,280m
1,280m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.7
(3)
25
riders
33.7km
01:53
80m
80m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
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Single track in the undergrowth, not too technical and very pleasant
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Exceptional site at the foot of the Dent de Crolle with access via a wild forest road
2
0
Imposing rock that offers numerous routes to climbers of all levels
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0
Perched at 1,434 meters, the Col du Coq is accessible after a twelve-kilometer climb regardless of the direction of the road taken. It offers a beautiful view of the Dent de Crolles.
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Beautiful view of the region, accessible tower, table for lunch, orientation table.
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A pass with little crowds (end of April 2024). The road is open despite the signs (no snow removal). The bitumen is correct, average in places (mounted in Gravel). A few very steep slopes with a small flat area which allows you to breathe on the Charteuse side. No infrastructure at the top. Road and bitumen in good condition on the St-Pacrasse side.
2
1
Not bad but be careful of the small paths and especially the passage at the edge of a very high chasm with a narrow path very close to the edge
0
0
The bottom of the descent is made up of fairly high steps, for a beginner mountain biker you will have to get off the bike!
0
0
There are nearly 200 mountain bike trails around Crolles, offering a wide range of options for all skill levels. This includes 17 easy routes, 41 moderate routes, and 140 difficult routes, ensuring diverse experiences across the Grésivaudan Valley and the surrounding massifs.
Crolles offers diverse terrain, from progressive paths suitable for beginners to technical and demanding routes for experienced riders. You'll find varied itineraries with thrilling descents and challenging sections across its mountainous landscape, nestled between the Belledonne and Chartreuse massifs.
While many routes are challenging, there are 17 easy mountain bike trails around Crolles that are more suitable for families or those looking for a gentler ride. Electric mountain bikes (E-MTBs) are also a great option for families to explore the natural areas more easily.
The region is rich in natural beauty. You can encounter landmarks like the iconic Dent de Crolles, offering panoramic views of the Chartreuse mountains and Grésivaudan Valley. The Charmant Som summit also provides exceptional 360-degree views of multiple mountain ranges. You might also pass by the sensitive natural environment around Col du Coq.
The mountain bike trails around Crolles are highly rated by the komoot community, with an average score of 4.3 stars from over 300 reviews. Riders often praise the diverse terrain, the challenging descents, and the stunning views of the Belledonne and Chartreuse massifs.
Yes, Crolles is particularly well-suited for advanced riders, with 140 difficult routes. A challenging option is the Tour de Montfallet – Col des Ayes (944 m) loop from Brignoud, a 35 km route with over 1200 meters of elevation gain, offering a demanding experience.
Yes, many mountain bike trails around Crolles are designed as loops. For example, the Manival Forest Refuge – Belle descente loop from Bernin is a 15.6 km trail that takes you through the Manival Forest, providing a complete circular experience.
The region is generally best explored from spring through autumn. During these seasons, the weather is more stable, and the trails are typically clear of snow, offering optimal conditions for mountain biking. Always check local weather conditions before heading out.
Yes, some areas offer amenities. For instance, near the Charmant Som summit, there's an inn at the Bergerie car park that offers traditional mountain cuisine and local dairy products, making it a pleasant stop for riders.
Yes, the region includes sensitive natural environments, such as the area around Col du Coq, known for wildlife like Black Grouses. The regional natural parks within the Belledonne and Chartreuse massifs, like the Hauts de Chartreuse Nature Reserve, are dedicated to preserving these pristine landscapes. Please respect all local regulations and stay on marked trails.
For a longer ride, consider the Large Rock – Short mountain bike descent loop from Brignoud. This route spans over 36 km with more than 1000 meters of elevation gain, providing a substantial and rewarding mountain biking adventure.
The Dent de Crolles is an iconic natural landmark known for its panoramic views and extensive underground network. You can find more information about this impressive mountain and its features, including the 'Trou du Glaz', on the Chartreuse Tourisme website.


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