4.4
(1181)
5,733
riders
480
rides
Mountain biking around Janvry offers diverse terrain within the Regional Natural Park of the Haute Vallée de Chevreuse. The area features a mix of lush forests, rolling hills, and valleys, providing varied environments for cyclists. Riders can find paths winding through oak forests and exploring parts of the Rambouillet forest. This landscape provides a range of mountain bike trails suitable for different skill levels.
Last updated: July 27, 2026
4.2
(14)
57
riders
48.5km
03:13
280m
280m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
2.5
(2)
17
riders
14.9km
01:05
170m
170m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.

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5.0
(3)
34
riders
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
5.0
(3)
16
riders
36.8km
02:42
340m
340m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.5
(4)
11
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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a portion of the track has been closed since March 31, 2025 (for 1 month)
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The castle of Forges-les-bains was built in the 17th century, before being remodeled in the 18th century by Edme Mathurin Le Jariel, squire of the king. Currently, some parts are dilapidated, others restored. It is the in-between.
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Hello everyone, be careful, several waypoints (notably 5) do not exist or no longer exist. I really struggle to follow this tour.
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The site is magnificent. and really impress.
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Very beautiful greenway which immerses us in nature
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long tunnel be careful arriving in the middle it is pitch black not easy to walk but no trap in the middle of this tunnel in the distance the exit is lit
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The Arrows of the Cathedrals is a monumental metal sculpture, created by Georges Saulterre and installed in 1989 along the A10 in the area of Forges-les-Bains. At a height of 21 meters it weighs 30 tonnes. In 1998, the sculpture was listed in the Guinness Book of World Records as "the tallest sculpture made by a man." It was acquired by Cofiroute. For more information: https://fr.wikipedia.org/wiki/Les_Fl%C3%A8ches_des_cath%C3%A9drales
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There are over 470 mountain bike trails around Janvry, offering a wide variety of options for different skill levels. The komoot community has rated these routes with an average score of 4.4 stars.
The trails around Janvry cater to various skill levels. You'll find 84 easy routes, 291 moderate routes, and 96 difficult routes, ensuring there's something for everyone from beginners to experienced riders.
The terrain in Janvry, located within the Regional Natural Park of the Haute Vallée de Chevreuse, is diverse. You can expect lush forests, rolling hills, valleys, and riverbanks. Trails often wind through oak forests and parts of the Rambouillet forest, providing varied and engaging environments.
Yes, Janvry offers several family-friendly mountain bike trails, particularly among the 84 easy routes available. The area's natural park setting and attractions like the Janvry Animal Park make it suitable for family outings. Look for routes with lower elevation gain and shorter distances for a more relaxed experience.
While mountain biking near Janvry, you can explore a rich tapestry of natural and historical attractions. Highlights include historic sites like the medieval La Madeleine Castle, offering panoramic views, and other castles such as Breteuil Castle. You can also discover natural monuments like The Oak of Petit Launay and Le Rocher Gris.
The mountain bike trails in Janvry are highly regarded by the komoot community, with an average rating of 4.4 stars from over 1200 reviews. More than 6000 mountain bikers have explored the area using komoot, often praising the diverse terrain, lush forests, and well-maintained paths.
Yes, many of the mountain bike trails around Janvry are circular, allowing you to start and end at the same point. An example of a popular loop is the Fauvettes Viaduct – Montjay Tunnel loop from Gometz-la-Ville, which covers 10 miles (16.1 km) through varied terrain.
Trail lengths vary significantly. You can find shorter routes, such as the Valley view – Roche Turpin Forest loop from Fontenay-lès-Briis at 6.3 miles (10.1 km), or longer excursions like the Lac d'Olainville – Orge Riverbank Snack Bar loop from Briis-sous-Forges, which is 29.3 miles (47.2 km) long.
While specific parking areas for mountain bikers are not always explicitly marked, the villages and starting points of many trails within the Haute Vallée de Chevreuse Regional Natural Park typically offer public parking options. It's advisable to check the starting point of your chosen route for local parking availability.
The Haute Vallée de Chevreuse is enjoyable for mountain biking throughout much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery with changing foliage. Summer can be warm but trails through the forests provide shade. Winter riding is possible, but conditions may be muddy or icy, especially after rain or snow.
Absolutely. Janvry and the surrounding Haute Vallée de Chevreuse offer 96 difficult routes for advanced riders. These trails often feature rugged paths, technical sections, and significant elevation changes. An example is the Vallée de la Mérantaise – Aigrefon wood loop from Les Ulis, which traverses challenging sections through the Vallée de la Mérantaise and Aigrefon wood.
Accessing the Haute Vallée de Chevreuse Regional Natural Park, where Janvry is located, by public transport is possible, though it may require some planning. Regional train lines (RER B and C) serve towns within or near the park, from which you might connect via local buses or cycle to trailheads. For detailed information on public transport options to the region, you can consult resources like Visit Paris Region.


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