4.4
(1533)
7,410
riders
372
rides
Mountain biking around Le Mesnil-Saint-Denis offers a network of trails primarily through dense woodlands and gently rolling terrain. The region is characterized by its extensive forest areas, providing shaded paths and varied surfaces suitable for mountain biking. These routes often feature a mix of singletrack and wider forest roads, with moderate elevation changes.
Last updated: July 5, 2026
4.6
(28)
95
riders
43.8km
03:58
700m
700m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.4
(21)
90
riders
24.3km
01:54
140m
140m
Hard mountain bike ride. Great for any fitness level. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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3.7
(7)
42
riders
51.4km
03:53
410m
410m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.7
(59)
231
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.0
(3)
29
riders
34.4km
02:37
320m
320m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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easy calm but crowded on weekends in good weather
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The turtle head welcomes you at the end of the hike with its two big, friendly eyes!
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Water reservoirs on the Bièvre (river bearing the old name of the beaver), whose level is managed by the SIAVB (Intercommunal Syndicate for the Sanitation of the Bièvre Valley), the ponds of Moulin de Renard, Minière, Geneste, offer a natural reservoir for fauna and flora. Herons, swans, moorhens, mallards, great crested grebes, cormorants, barnacle geese, kingfishers and many other birds populate the banks of these ponds. Wild boars, foxes, roe deer are also present as well as wild rabbits, red squirrels or chipmunk squirrels (striped or Korean). Many flat or sloping paths allow hikers, joggers and cyclists to create their own circuits in this haven of greenery. Definitely worth discovering.
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The river flows through the narrow rocky chaos: it almost feels like you are in the mountains.
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Brand new track and landscape worth seeing
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A magnificent playground for thrill seekers. The paths through the sandpit give you the opportunity to test your legs on the mounds.
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Near Maincourt-sur-Yvette, this wood has beautiful rock formations climbing up the first slopes of the Chevreuse valley, just a few meters from the river.
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There are over 360 mountain bike trails in the Le Mesnil-Saint-Denis area, offering a wide range of options for different skill levels and preferences.
Yes, the region offers over 70 easy mountain bike routes, perfect for beginners or those looking for a relaxed ride. These trails typically feature gentle terrain through the woodlands.
You can expect a mix of dense woodlands, forest paths, and gently rolling terrain. Trails often feature a combination of singletrack and wider forest roads, with moderate elevation changes.
Absolutely. For experienced riders seeking a challenge, there are over 100 difficult mountain bike routes. Trails like Single from Port-Royal – Port Royal Singletrack loop from La Verrière offer technical sections and varied forest terrain.
Many routes offer scenic views through the extensive forest areas. The Étang des Noës – Port Royal Singletrack loop from La Verrière, for example, features beautiful sections alongside the Étang des Noës lake and through woodlands.
Yes, many of the mountain bike trails in the region are circular, allowing you to start and end your ride at the same point. The Beautiful singletracks loop from La Verrière is a popular circular option.
The trails often pass by various points of interest. You might encounter beautiful lakes such as Geneste Pond or Minière Ponds. Historic sites like Dampierre-en-Yvelines Castle are also nearby.
The area is highly rated by the komoot community, with an average score of 4.4 stars from over 1500 reviews. Reviewers often praise the varied terrain, the dense and quiet woodlands, and the well-maintained forest paths.
While Le Mesnil-Saint-Denis itself is a small commune, nearby towns like La Verrière often serve as starting points for many routes and are accessible by public transport, such as regional trains (Transilien N or U lines). From there, you can cycle to the trailheads.
Parking is generally available at common starting points for trails, particularly in and around nearby villages or designated forest parking areas. It's advisable to check the specific route details on komoot for recommended parking spots near your chosen trailhead.
Yes, several routes incorporate the region's beautiful bodies of water. The Étang des Noës – Port Royal Singletrack loop from La Verrière is a great example, offering views of the Étang des Noës.
Spring and autumn generally offer the most pleasant conditions for mountain biking, with mild temperatures and vibrant foliage. Summer can also be enjoyable, especially on shaded forest trails. Winter riding is possible, but trails might be muddy or icy depending on conditions.


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