4.4
(1051)
7,072
riders
501
rides
Touring cycling around Boullay-Les-Troux offers routes through varied landscapes at the edge of the Hurepoix plateaus and the Chevreuse Valley. The region is characterized by a mix of rural agricultural land, extensive forests, and river valleys. Cyclists can explore protected natural environments within the Parc Naturel Régional de la Haute Vallée de Chevreuse. The terrain includes both open agricultural spaces and forested paths, with some routes featuring challenging climbs.
Last updated: October 30, 2026
4.3
(7)
108
riders
Easy bike ride. Mostly paved surfaces.
4.8
(15)
39
riders
16.9km
01:08
140m
140m
Easy bike ride. Mostly paved surfaces.

32
riders
59.9km
05:05
800m
800m
Hard bike ride. Very good fitness required. You may need to push your bike for some segments of this route.
5.0
(1)
16
riders
Moderate bike ride. Good fitness required. Mostly paved surfaces.
14
riders
Hard bike ride. You may need to push your bike for some segments of this route.
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Thanks for the info! I thought it was a control tower for the old railway line. Since there was only one track, this tower was used to ensure that two trains in opposite directions did not use it.
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For more information on this experimental tower, go here: https://www.domainestpaul.fr/histoire-laboratoire-fluides-lvf/
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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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very nice gravel descent from Boullay-les-Troux to St Rémy
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[In Advent] "we hear in the Gospel the beginning of the ministry of Saint JEAN BAPTIST. He appears in the desert and calls people to conversion so that they may prepare for the coming of the Lord. His call reminds us that Advent is not only a time of waiting, but also of interior preparation. "Prepare the way of the Lord, make straight his paths" (Luke 3:4). John's message challenges us to examine our lives. What "rough paths" and "crooked roads" are there in our hearts? Where have we perhaps distanced ourselves from God or lost sight of our fellow human beings? John invites us to remove these obstacles and reorient our lives. But his call has not only a personal dimension, but also a social one: the way of the Lord is a way of justice, peace and reconciliation. When we pave the way of the Lord, we bring light into the darkness of the world and hope into the hearts of people." (Text: Michael Inden, Diocesan President of the KAB in the Archdiocese of Cologne)
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The Chemin du Bras Mort cycle path in Bures-sur-Yvette offers a serene and picturesque ride through the natural beauty of the Chevreuse Valley. Following the meanders of the Yvette, this path takes you through lush greenery where you can observe the fauna and flora along the banks.
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There are over 460 touring cycling routes around Boullay-Les-Troux, catering to various skill levels. This includes 138 easy routes, 173 moderate routes, and 149 difficult routes, offering a wide range of options for exploration.
The terrain around Boullay-Les-Troux is quite varied, situated at the edge of the Hurepoix plateaus and the Chevreuse Valley. You'll encounter a mix of rural agricultural land, extensive forests, and river valleys. Routes often feature mostly paved surfaces, with some challenging climbs, especially in the Chevreuse Valley, alongside more gentle paths through woods and prairies.
The region is rich in both natural beauty and historical sites. You can cycle through the Parc Naturel Régional de la Haute Vallée de Chevreuse, which includes the scenic Chevreuse Valley and extends towards the vast Rambouillet Forest. Historical architecture like charming millstone houses and old farmhouses are common. Notable landmarks include the well-known Dampierre-en-Yvelines Castle, and the former Abbaye de Port-Royal-des-Champs.
Yes, the area around Boullay-Les-Troux features several impressive castles that can be incorporated into your cycling tours. Besides the prominent Dampierre-en-Yvelines Castle, you might also encounter La Madeleine Castle or Breteuil Castle, offering cultural stops during your rides.
Yes, several routes will take you past beautiful water features. The Montabé Wetland is a notable natural area, and you can also find highlights such as the Ponds of Parc des Côtes Montbron, Beauséjour Lake, and Étang des Noës, which add to the scenic appeal of the region.
The touring cycling routes around Boullay-Les-Troux are highly rated by the komoot community, with an average score of 4.3 stars from over 900 reviews. Cyclists often praise the diverse landscapes, from open agricultural spaces to dense forests, and the well-maintained paths that make exploring the Chevreuse Valley and Hurepoix Plateaus a rewarding experience.
Absolutely. There are 138 easy touring cycling routes around Boullay-Les-Troux. A great option for a relaxed ride is the Veloscenic: Chevreuse Valley Loop, an easy 7.6-mile (12.2 km) path that provides access to the diverse terrain of the Chevreuse Valley, featuring woods, prairies, and cultivated fields.
For experienced touring cyclists seeking a challenge, there are 149 difficult routes available. One such route is the Choisel Church – Path in Chevreuse loop from Saint-Rémy-lès-Chevreuse, a 31.4-mile (50.5 km) trail with significant elevation gain, offering a demanding yet rewarding ride through the region's varied landscape.
Yes, for those looking for longer rides, the area offers several options. The Hollande Pond – Rambouillet Castle loop from Saint-Rémy-lès-Chevreuse is a challenging 60.9-mile (97.9 km) route that takes you through extensive forested paths and past significant landmarks, ideal for a full day's adventure.
The region is enjoyable for touring cycling throughout much of the year. Spring and autumn generally offer pleasant temperatures and beautiful scenery, with blooming flowers or vibrant fall foliage. Summer can be warm but is also popular, especially for rides through shaded forest paths. Always check the local weather forecast before heading out.
Yes, many routes in the Boullay-Les-Troux area are designed as loops, allowing you to start and end at the same point. An example is the Veloscenic: Chevreuse Valley Loop, which is an easy and scenic option for exploring the valley.
While specific parking areas aren't detailed for every route, many touring cycling routes in the region, especially those starting from towns like Saint-Rémy-lès-Chevreuse, offer public parking facilities. It's advisable to check local maps or route descriptions for designated parking spots near your chosen starting point.
Boullay-Les-Troux and its surrounding towns, particularly those within the Chevreuse Valley, are generally well-connected by public transport, including regional train lines (RER B) that can take you to starting points like Saint-Rémy-lès-Chevreuse. This allows for convenient access to many touring cycling routes without needing a car.


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