4.4
(747)
5,035
riders
331
rides
Mountain biking around Boullay-Les-Troux offers diverse terrain at the edge of the Hurepoix plateaus and the Chevreuse Valley. The region features a mix of agricultural spaces and significant forested areas, providing varied natural environments for exploration. Key natural features include the Zone humide de Montabé, a wetland area where several streams converge before flowing into the Yvette river. This topography creates a network of trails through woodlands, open fields, and valleys.
Last updated: May 8, 2026
4.5
(13)
149
riders
40.0km
03:19
530m
530m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.6
(14)
83
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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4.6
(8)
80
riders
29.6km
02:34
480m
480m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
66
riders
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
3.7
(11)
56
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
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It's OK on mountain bikes, some hot sections on gravel
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Unmissable Gravel rides to reach Choisel
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Pretty castle well glimpsed at the heart of a beautiful gravel ride between Choisel and St Rémy
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Pretty little village in the middle of the Rhodon valley.
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very nice gravel descent from Boullay-les-Troux to St Rémy
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The wash houses of Chevreuse are history reborn before our eyes. Here, along with the values, there were also tanneries.
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While the Chevreuse Valley is well-known to all nature lovers in the Paris region, the town that gave it its name is less well-known. Its rich heritage is nevertheless worth a visit, particularly the Château de la Madeleine which overlooks the city.
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There are over 330 mountain bike trails around Boullay-Les-Troux, offering a wide range of options for different skill levels and preferences. This includes 66 easy routes, 173 moderate routes, and 95 difficult routes.
The terrain around Boullay-Les-Troux is quite diverse, situated at the edge of the Hurepoix plateaus and the Chevreuse Valley. You'll find a mix of agricultural spaces, significant forested areas, and valleys. Many trails feature unpaved segments and forested paths, providing varied natural environments perfect for off-road cycling.
Yes, Boullay-Les-Troux offers a good selection of trails suitable for beginners and families. There are 66 easy mountain bike routes available, providing gentler rides through the region's scenic landscapes. These routes often feature less challenging elevation gains and smoother paths.
The region is rich in natural and historical points of interest. You might pass by the Fauvettes Viaduct, explore the La Madeleine Castle, or discover the Dampierre-en-Yvelines Castle. Natural features include the Zone humide de Montabé, a wetland area, and various ponds and lakes like Ponds of Parc des Côtes Montbron or Beauséjour Lake.
Absolutely. For experienced riders seeking a challenge, there are 95 difficult mountain bike routes. One such route is the Aigrefon wood – Single des 17 Tournants loop from Saint-Rémy-lès-Chevreuse, which covers 58 km with significant elevation gain, offering a demanding ride through varied forest paths.
The area is highly rated by the komoot community, with an average score of 4.5 stars from over 700 reviews. Reviewers often praise the diverse terrain, the extensive network of trails through forests and fields, and the scenic beauty of the Hurepoix plateaus and the Chevreuse Valley.
Yes, many mountain bike routes in the area are designed as loops, allowing you to start and finish at the same point. For example, the Fauvettes Viaduct – Aigrefon wood loop from Saint-Rémy-lès-Chevreuse is a moderate 29.5 km loop that takes you through Aigrefon wood.
The region is generally pleasant for mountain biking from spring through autumn. The forested areas provide good shade in warmer months, and the varied terrain is beautiful when the leaves change color. Winter riding is possible, but trail conditions may vary, especially in wetland areas.
Yes, the region features several water bodies. The Zone humide de Montabé is a notable wetland area, and some routes may pass by lakes such as Étang des Noës or Sourderie Lake. These offer scenic spots and a chance to enjoy the natural environment.
Boullay-Les-Troux is situated within the Parc Naturel Régional de la Haute Vallée de Chevreuse, which is accessible by public transport, particularly via train lines that serve towns like Saint-Rémy-lès-Chevreuse. Many routes, including popular ones, start from these more accessible points, making it feasible to combine public transport with your mountain biking adventure.
Certainly. The Méridon Castle – ⛲Lavoir de Chevreuse loop from Saint-Rémy-lès-Chevreuse is a great option. This difficult 40 km route explores the Chevreuse Valley, passing by historical sites like Méridon Castle and through beautiful natural landscapes, offering a rich experience.
Elevation gains vary significantly depending on the trail's difficulty. Easy routes will have minimal climbing, while more challenging routes can feature substantial ascents. For instance, a difficult route like the Washhouse at the Fairies' Spring – Nice path in the forest loop from Saint-Rémy-lès-Chevreuse includes an elevation gain of over 780 meters, providing a good workout.


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