4.4
(1589)
7,426
riders
511
rides
Mountain biking around Marcoussis offers access to the diverse landscapes of the Haute Vallée de Chevreuse Regional Natural Park. The region features extensive forests, such as the Dourdan Forest, providing numerous shaded trails. Riders can explore picturesque valleys, including the Vallée de l'Orge, and encounter varied terrain with inclines and descents. This area provides a mix of natural features suitable for different mountain biking experiences.
Last updated: June 29, 2026
5.0
(1)
61
riders
84.4km
06:21
810m
810m
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
(23)
11
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Sign up for free
3.7
(3)
14
riders
29.4km
02:27
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.
4.0
(4)
11
riders
41.0km
02:47
260m
260m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.0
(3)
8
riders
41.9km
02:56
500m
500m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
Get access to more routes and recommendations from other explorers.
Sign up for free
Already have an account?
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Start today with a free account
Your next adventure awaits.
Login or Signup
The crêperie, the lakeside chalet, serves excellent crêpes and boasts a magnificent view. A very friendly place. It's located near the basilica in Lonpon-sur-Orge.
0
0
superb waterfalls, superb associative hostel with exhibition, café restaurant on the banks of the torrent, warm welcome
0
0
It's OK on mountain bikes, some hot sections on gravel
0
0
Usually muddy course but it's starting to dry out...it's cool.
0
0
The river flows through the narrow rocky chaos: it almost feels like you are in the mountains.
0
0
There are over 500 mountain bike trails around Marcoussis, offering a wide variety of routes for all skill levels. This includes nearly 100 easy routes, over 300 moderate routes, and close to 90 difficult routes, ensuring there's something for every rider.
Mountain biking around Marcoussis offers diverse terrain within the Haute Vallée de Chevreuse Regional Natural Park. You'll find extensive lush forests, picturesque valleys like the Vallée de l'Orge, and varied topography with inclines and descents. Trails can range from shaded forest paths to routes with 'montées franches' (steep climbs) and 'descentes' (descents), providing a dynamic riding experience.
Yes, the region offers several family-friendly options, particularly among the nearly 100 easy routes available. These trails often feature gentler gradients and less technical terrain, making them suitable for riders of all ages. Look for routes that explore the less challenging sections of the Dourdan Forest or the Vallée de l'Orge for a pleasant family outing.
Many trails in the natural parks and forests around Marcoussis are dog-friendly, especially if your dog is well-behaved and kept on a leash. It's always a good idea to check specific trail regulations or local signage, particularly within protected areas like the Haute Vallée de Chevreuse Regional Natural Park, to ensure a pleasant experience for everyone.
The trails around Marcoussis are rich in natural beauty and points of interest. You can explore extensive forests like the Forêt de Rambouillet and Dourdan Forest, ride through picturesque valleys, and discover scenic ponds such as the Trévoix Pond or the Carouge Basin. The Saclay Ponds, an ornithological nature reserve, are also nearby. The Valley view – Roche Turpin Forest loop from Fontenay-lès-Briis offers scenic vistas.
Yes, many mountain biking routes in the Chevreuse Valley integrate historical sites. You can ride past impressive structures like the Beauregard Castle or the Château de Courson. The region's trails often combine outdoor activity with cultural discovery, allowing you to explore the rich heritage of the area.
For a moderate-difficulty loop, consider the Technical Forest Singletrack – Montjay Tunnel loop from Les Ulis. This route covers approximately 26.9 km with around 350 meters of elevation gain, leading you through varied forest terrain and offering a good balance of challenge and enjoyment.
If you're looking for a longer and more challenging ride, the Path along the Ru des Vaux – Small bridge loop from Les Ulis is an excellent option. This difficult route spans 84.6 km with over 800 meters of elevation gain, navigating through varied terrain and offering a significant endurance test.
The mountain bike trails around Marcoussis are highly regarded by the komoot community, with an average rating of 4.4 stars from over 1600 reviews. Riders often praise the diverse landscapes, the extensive network of trails through lush forests, and the varied terrain that caters to different skill levels. Many appreciate the combination of natural beauty and challenging sections.
Yes, the Orge Riverbank Snack Bar – Côte de l'Escargot loop from Montlhéry is a great example. This moderate 38.7 km trail leads through a pleasant mix of riverbanks and wooded areas, providing a varied journey with scenic views and different riding surfaces.
The region is enjoyable for mountain biking for much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery, with vibrant foliage or blooming nature. Summer provides shaded trails within the extensive forests, which can be a welcome relief. Even in winter, many trails remain accessible, though conditions can be wetter, and some paths might be muddy.
Absolutely. The Aigrefon wood – Vallée de la Mérantaise loop from Marcoussis is a fantastic choice. This moderate 42.6 km route takes you through dense woods and offers beautiful views of the valley landscapes, providing a quintessential Marcoussis mountain biking experience.


Browse the best MTB trails in other regions.