4.6
(18)
66
riders
17
rides
Gravel biking around Treffort offers routes through a landscape characterized by significant elevation changes, mountain passes, and scenic water features. The region's diverse terrain includes varied surfaces suitable for gravel bikes, from compacted earth to gravel tracks. Cyclists can expect challenging climbs and descents, often traversing cols and old mountain roads. Treffort's proximity to the Vercors Regional Natural Park provides a vast network of trails for exploration.
Last updated: May 21, 2026
5.0
(3)
10
riders
39.0km
03:09
980m
980m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.4
(5)
13
riders
10.3km
00:55
230m
230m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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6
riders
48.9km
03:38
1,170m
1,170m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
10
riders
79.5km
06:04
2,000m
2,000m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
5
riders
58.7km
04:23
1,570m
1,570m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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From Saint-Michel-les-Portes, it's about 7 km at an average gradient of 8%. The last few kilometers often reach double digits. A cruel climb if it's the last one of your day...
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A small village in the southern Vercors, ideal for starting a hike
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Beautiful view and nice place with a table
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magnificent little walk to do
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Beautiful chapel with Mont Aiguille in the background.
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The Col des Deux is not located in the Bauges Massif but in the Vercors between the Col de l’Arzelier and the Col de l’Allimas. This trilogy is well known to cyclists in the Grenoble metropolitan area.
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There are 19 gravel bike routes around Treffort listed on komoot. These trails offer a variety of experiences, predominantly featuring significant elevation changes and mountain passes.
While most gravel bike routes around Treffort are considered difficult due to substantial ascents and descents, there is one moderate trail suitable for those looking for a less strenuous ride. The View of Lac du Sautet – Ebron Footbridge loop from Treffort is a 6.4-mile (10.3 km) route that offers scenic views without the extreme challenges of other trails.
Gravel biking around Treffort is characterized by significant elevation changes. For example, the Col de l'Allimas – Fau Pass loop from Clelles-Mens involves over 3,800 feet (1,168 m) of ascent, while the Vieille Route de Grimone – Col de Grimone (1318 m) loop from Clelles-Mens features over 6,600 feet (2,019 m) of climbing. Be prepared for challenging mountain passes.
Yes, many of the gravel bike routes in the Treffort region are circular, allowing you to start and end at the same point. Examples include the Col de l'Arzelier – East Balcony of the Vercors loop from Miribel-Lanchâtre and the Col de l'Arzelier – Col de l'Allimas loop from Miribel-Lanchâtre, both offering extensive loops through the mountainous terrain.
The region offers stunning views, particularly of its lakes and mountain passes. Along the trails, you can find highlights such as the Ebron Footbridge, various viewpoints overlooking Lac du Sautet and Lake Monteynard, and the impressive La Pierre Percée natural monument.
The gravel biking routes around Treffort are highly rated by the komoot community, with an average score of 4.5 stars from over 14 reviews. Riders frequently praise the challenging mountain passes, the varied terrain, and the spectacular lake views, particularly those of Lac du Sautet.
Given the region's mountainous terrain and significant elevation, late spring through early autumn generally offers the most favorable conditions for gravel biking in Treffort. During these months, trails are typically clear of snow, and the weather is more stable for tackling the challenging ascents and descents.
Yes, mountain passes are a defining feature of gravel biking in Treffort. Routes like the Col de l'Allimas – Fau Pass loop from Clelles-Mens and the Vieille Route de Grimone – Col de Grimone (1318 m) loop from Clelles-Mens specifically navigate through these challenging and scenic high points.
Many of the gravel routes in Treffort utilize old mountain roads, providing a unique riding experience. The Vieille Route de Grimone – Col de Grimone (1318 m) loop from Clelles-Mens is a prime example, leading you along historic paths through the mountains.
Absolutely. The View of Lac du Sautet – Ebron Footbridge loop from Treffort is specifically designed to showcase the beautiful Lac du Sautet, offering picturesque views throughout the ride.
The terrain around Treffort is varied, suitable for gravel bikes. You can expect a mix of compacted earth, gravel tracks, and old mountain roads. These surfaces contribute to the challenging and diverse nature of the rides.


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