4.5
(450)
2,221
riders
16
rides
Mountain bike trails around Briis-Sous-Forges traverse a varied landscape within the Hurepoix region, characterized by significant elevation changes and diverse natural features. The area features extensive woodlands like the Bois de Croulard and Bois de la Garenne, offering numerous marked trails. Valleys and hills provide scenic backdrops for rides, with altitudes ranging from 87m to 173m, creating dynamic terrain for mountain biking.
Last updated: June 29, 2026
4.2
(14)
57
riders
48.5km
03:13
280m
280m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(5)
15
riders
21.5km
01:45
320m
320m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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5.0
(2)
12
riders
28.1km
02:10
290m
290m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
8
riders
47.9km
03:48
450m
450m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(1)
8
riders
25.3km
02:07
330m
330m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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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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Church of Our Lady of the Assumption of Forges-les-bains. If you want more information, they have a website https://www.secteurlimours-catholique.fr/
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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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Small fun single on the descent, but passable on the ascent
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Like many crossroads in the forest, there is a post but no indication...
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Typical of the Chevreuse valley
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Bucolic corner with this magnificent oak tree whose branches drop above a pond
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Briis-Sous-Forges offers a diverse selection of 19 mountain bike trails, catering to various skill levels. The region's varied landscape, with its woodlands and elevation changes, provides a rich environment for mountain biking.
Yes, Briis-Sous-Forges has trails suitable for different abilities. There are 2 easy mountain bike trails, which can be a good starting point for beginners or families looking for a less challenging ride. The majority of trails are moderate, offering a balanced experience.
The terrain around Briis-Sous-Forges is characterized by dense woodlands, scenic valleys, and varied elevation changes. You'll encounter trails through extensive forests like the Bois de Croulard and Bois de la Garenne, with altitudes ranging from 87m to 173m, providing dynamic and engaging rides.
Yes, many of the trails in Briis-Sous-Forges are circular, allowing you to start and end at the same point. For example, the Château de Forges-les-Bains – Sandpit loop from Briis-sous-Forges is a moderate 15.7-mile (25.3 km) circular route that takes you through varied landscapes.
The region is rich in natural beauty. You can find scenic views along trails that pass through valleys, such as those near the Fauvettes Viaduct. The Golf de Marivaux – valley view loop from Briis-sous-Forges is specifically known for offering scenic views. The historic La Madeleine Castle also provides exceptional views over the Chevreuse valley.
Yes, the area features several beautiful ponds and lakes. The Sandpit – Étang de la Baleine loop from Briis-sous-Forges is a moderate 19.1-mile (30.8 km) route that takes you past the Étang de la Baleine. Other notable water bodies include Lac d'Olainville and Trévoix Pond.
The mountain bike trails in Briis-Sous-Forges are highly rated by the komoot community, with an average score of 4.5 stars from over 400 reviews. Riders often praise the varied terrain, the extensive woodlands, and the dynamic elevation changes that make for engaging rides.
Trail durations vary depending on the route and your pace. For instance, the Bullion Church – Étang de la Baleine loop from Briis-sous-Forges, a moderate 18.8-mile (30.2 km) path, typically takes around 2 hours 20 minutes. Longer routes, like the Lac d'Olainville – Orge Riverbank Snack Bar loop from Briis-sous-Forges (29.3 miles / 47.2 km), can take over 3 hours.
Yes, the region has historical points of interest. While not directly on every trail, the La Madeleine Castle is a significant landmark offering exceptional views over the Chevreuse valley. You might also encounter other historical elements as you explore the countryside.
The verdant setting of Briis-Sous-Forges makes it enjoyable for mountain biking through much of the year. Spring and autumn offer pleasant temperatures and beautiful foliage, while summer provides longer daylight hours. The extensive woodlands also offer some shade during warmer months.
Yes, the region's varied altitudes and significant elevation changes provide opportunities for challenging climbs. The Milon-la-Chapelle Wall, located in the Chevreuse valley, is a notable steep climb spanning about 600 meters, presenting a significant challenge for cyclists seeking more advanced terrain.


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