4.2
(335)
26,355
riders
26
rides
Road cycling routes around Lac du Vallon are situated in a mountainous region near Grenoble, characterized by significant elevation changes and alpine passes. The terrain features challenging climbs and descents, with routes often traversing through valleys and alongside natural features. This area provides diverse road cycling experiences, from demanding ascents to more gradual paths.
Last updated: July 2, 2026
107
riders
104km
07:02
3,380m
3,380m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
5.0
(1)
42
riders
36.7km
02:35
1,310m
1,310m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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6
riders
7.69km
00:31
260m
260m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
6
riders
7.04km
00:29
240m
240m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
4.9
(14)
1,387
riders
38.2km
02:22
1,020m
1,020m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
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Very pleasant to ride, as it is rarely steeper than 6-7%
0
0
From Le Bourg-d'Oisans the pass is very pleasant to drive.
1
0
For real climbers who move upwards like a chamois.
3
0
An iconic climb ridden countless times in the Tour de France.
13
0
From this hairpin bend you can enjoy a sublime view.
10
0
The road cycling routes around Lac du Vallon offer a diverse range of difficulties. You'll find a good mix of challenging climbs and descents, characteristic of a mountainous region. Out of 21 routes, 9 are classified as difficult, 4 as moderate, and 8 as easy, catering to various skill levels.
Yes, Lac du Vallon offers several options suitable for beginners. There are 8 easy-rated road cycling routes in the area. For example, the Col d'Ornon – Ornon Pass loop from Col d'Ornon is an easy 4.9-mile (7.9 km) trail that can be completed in about 31 minutes, offering a pleasant ride through mountain pass scenery.
Advanced road cyclists will find plenty of challenging routes around Lac du Vallon, with 9 difficult-rated tours available. A prime example is the Alpe d'Huez Climb – Col d'Ornon loop from Les Bouleaux, a demanding 64.5-mile (103.9 km) trail featuring substantial climbing through alpine landscapes.
Yes, many of the road cycling routes in the Lac du Vallon area are designed as loops, allowing you to start and finish at the same point. For instance, the Col de Parquetout Climb – Ornon Pass loop from Chantelouve is a difficult 22.8-mile (36.7 km) circular path offering significant elevation gain.
Given its mountainous terrain and alpine passes, the best time for road cycling in Lac du Vallon is typically from late spring through early autumn (May to October). During these months, the weather is generally more stable, and the higher passes are clear of snow, providing optimal conditions for challenging climbs and scenic rides.
The road cycling routes in Lac du Vallon are highly regarded by the komoot community, holding an average rating of 4.2 stars from over 200 reviews. Cyclists frequently praise the challenging climbs, the stunning alpine scenery, and the diverse options available for different ability levels, from demanding ascents to more gradual valley paths.
While many routes feature significant elevation changes, there are easier options that families with some cycling experience might enjoy. The 8 easy routes, such as the Ornon Pass – Col d'Ornon loop from Chantelouve, a 7.3-mile (7.3 km) ride, offer less strenuous paths through scenic areas, making them more accessible for a family outing.
Road cycling around Lac du Vallon offers spectacular alpine views. Routes often traverse through deep valleys, alongside natural features, and over high mountain passes, providing panoramic vistas of the surrounding peaks and landscapes. You'll experience diverse scenery, from dense forests to open mountain expanses.
There are 21 distinct road cycling routes available around Lac du Vallon, offering a wide variety of distances and difficulty levels to explore the mountainous region near Grenoble.
For a route that combines a good challenge with beautiful scenery, consider the Le Bourg-d'Oisans – Ornon Pass loop from Chantepérier. This difficult 23.8-mile (38.2 km) route features over 1000 meters of elevation gain, taking you through varied landscapes and offering rewarding views of the alpine environment.
Road cycling in Lac du Vallon during winter can be challenging due to snow and ice, especially on higher alpine passes. Many routes may be impassable or require specialized equipment. It's generally recommended to check local weather and road conditions before attempting any winter rides, and to stick to lower elevation routes if conditions permit.


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