4.4
(497)
2,588
riders
225
rides
Mountain biking around Merlas offers routes through a landscape characterized by the foothills of the Chartreuse Regional Natural Park. The terrain features significant elevation changes, with trails winding through forested areas and past local water bodies. This region provides a mix of challenging climbs and descents, typical of a mountainous and hilly environment.
Last updated: May 4, 2026
5.0
(3)
9
riders
27.8km
02:33
510m
510m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
16
riders
20.4km
02:25
630m
630m
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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4.0
(3)
11
riders
27.4km
02:22
620m
610m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
9
riders
38.1km
04:29
1,270m
1,270m
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)
12
riders
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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Easy along the canal, pretty greenway at the foot of the Chartreuse
0
0
Beautiful trail, but be careful, some sections are treacherous with all those logs and crooked trunks. They've really damaged our forest, thank you, Europe and the ONF (National Forestry Office).
0
0
Nice but unfortunately closed, the sign in the attached photo explains its history
0
0
Very peaceful walk on the Via Chartreuse from the gorges of Crossey to Entre-2-Guiers. I saw 1 passage under 30-40cm of water in June 2024 during the heavy rain episodes
0
0
A must see, break on Via Chartreuse.
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0
Very pleasant pass to climb, not too steep a slope, well marked all the way.
2
1
End of the climb and arrival on the plateau
0
0
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.
3
0
There are over 200 mountain bike trails around Merlas, offering a wide range of options for different skill levels. The komoot community has mapped 223 routes in total.
Merlas offers a variety of trail difficulties. You'll find 26 easy routes, 67 moderate routes, and 130 difficult routes. The region is known for its significant elevation changes, so many trails present challenging climbs and descents.
Yes, Merlas has 26 easy mountain bike routes that are generally suitable for families. These trails typically have less demanding terrain and elevation changes, making them a good option for a more relaxed ride.
The trails around Merlas wind through the foothills of the Chartreuse Regional Natural Park, offering scenic views of forested areas and local water bodies. You can expect a mix of natural landscapes, including hills and valleys.
Yes, many of the mountain bike routes in Merlas are circular. For example, you could try the difficult Croix Saint-Joseph loop from Miribel-les-Échelles, which offers challenging climbs and scenic views. Another option is the Lake Saint-Sixte loop from Saint-Geoire-en-Valdaine, leading through forested hills and past the lake.
While mountain biking around Merlas, you can encounter several natural attractions. Highlights include the Grenant Stream and the dramatic Gorges du Crossey. You might also pass by the Col des Égaux or enjoy views from the Croix des Cochettes View of Lac de Paladru.
Trail durations vary significantly based on difficulty and length. For instance, the difficult Canal de l'Herretang – Saint Joseph de rivière loop from Saint-Roch, which is 17.2 miles (27.8 km) long, typically takes around 2 hours 33 minutes. Longer, more challenging routes like the Lake Saint-Sixte – Thousand Martyrs Pass loop from Massieu can take over 4 hours.
The mountain bike trails in Merlas are highly regarded by the komoot community, with an average rating of 4.4 stars from over 500 reviews. Nearly 3000 mountain bikers have used komoot to explore the varied terrain, often praising the challenging nature and scenic beauty of the routes.
Yes, experienced riders will find plenty of challenges. The region features 130 difficult routes. A particularly demanding option is the Croix Saint-Joseph – Lake Saint-Sixte loop from Massieu, which covers over 30 km and includes significant elevation gain, making it a great test of endurance and skill.
The terrain around Merlas is characterized by the foothills of the Chartreuse Regional Natural Park, meaning you'll encounter a mix of forested paths, significant elevation changes, and trails that often pass by local lakes and rivers. Expect varied surfaces typical of a mountainous and hilly environment.


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