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France
Auvergne Rhône Alpes
Grenoble

Crolles

The best MTB trails around Crolles

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.

Best mountain bike trails around Crolles

  • The most popular mountain bike trail is Short mountain bike…

Last updated: June 17, 2026

5.0

(4)

62

riders

#1.

Manival Forest Refuge – Belle descente loop from Bernin

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.

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Hard

Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

Hard
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Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

Hard

Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

Hard

4.7

(3)

25

riders

Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.

Moderate
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Popular around Crolles

Road Cycling Routes around Crolles

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Tips from the Community

Ced
October 17, 2025, Single du manival

Single track in the undergrowth, not too technical and very pleasant

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Gilles DUCOL
July 18, 2025, Col du Coq

Exceptional site at the foot of the Dent de Crolle with access via a wild forest road

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Imposing rock that offers numerous routes to climbers of all levels

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Nicolas Vergnaud
September 17, 2024, Col du Coq

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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Mercure
April 28, 2024, Col du Coq

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.

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2

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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

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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!

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Frequently Asked Questions

How many mountain bike trails are available around Crolles?

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.

What kind of terrain and difficulty can I expect on mountain bike trails near Crolles?

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.

Are there any family-friendly mountain bike trails in Crolles?

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.

What are some scenic viewpoints or natural features I can see while mountain biking in Crolles?

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.

What do other mountain bikers enjoy most about the trails in Crolles?

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.

Are there any mountain bike trails that offer a good challenge for advanced riders?

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.

Can I find circular mountain bike routes in the Crolles area?

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.

What is the best time of year for mountain biking in Crolles?

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.

Are there any places to stop for food or drink along the mountain bike routes?

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.

Are there any specific natural reserves or protected areas I should be aware of while mountain biking?

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.

Are there any long-distance mountain bike routes for an extended ride?

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.

Where can I find information about the Dent de Crolles and its unique features?

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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