Bullion walks

In the Haute Vallée de Chevreuse Natural Park, this hike alternates between forest paths and small roads through meadows and woods, revealing a rich heritage including the Fontaine Sainte-Anne, which was a place of pilgrimage for many years.

This short walk combines natural and built heritage. In the first part, you will discover Bonnelles and its old castle by following the paths that wind through the village. In the second part, you will walk through the commune's nature reserve, surrounded by wetland vegetation and two beautiful ponds.

Hike through the woods and pretty little villages.

In the Haute Vallée de Chevreuse Natural Park, a hike mainly through forest, with a variety of tree species and ponds hidden in the fern undergrowth. The Fontaine Sainte-Anne, which was a place of pilgrimage for many years, is a pleasant spot to stop for a rest.

A short walk in a beautiful forest environment, perfect for getting some fresh air in the morning or afternoon. In the heart of the forest, a remarkable tree, the Gros Chêne (Big Oak), lives up to its name.

A hike in the Haute Vallée de Chevreuse Regional Nature Park, where you can play leapfrog with the Rémarde river. You will encounter old mills, two beautiful churches and an oratory dedicated toSaint Arnoult, patron saint of walkers! You will follow paths along horse pastures or the edge of woods, quiet roads, lanes and footpaths.

A loop starting from Cernay-la-Ville. Head west towards Le Perray and Vieille-Église. Return via the Rambouillet Forest. 75% of the route is in the forest. Start and finish in the town centre.The circuit is almost flat (a small descent and climb towards the end), with a little road at the start and end (2 x 1.5 km) and the rest on forest paths. No technical difficulty, but it's not a leisurely ride (not suitable for families), as the paths can be very bumpy (stones, ruts, etc.) but are nevertheless often very beautiful.

A pleasant route offering varied landscapes through the woods and fields of the Hurepoix.

Near Rambouillet, the Vaux de Cernay offer many pleasant walks. The one suggested here gives a good overview of the variety of the site: ponds and wetlands, a passage through a chaos of sandstone and old quarries. This walk is pleasant in all seasons. 07/08/2023 Message from the moderator: hike modified at point 2 to avoid private property.

A rural and wooded route in the Hurepois region, with some beautiful views from the Butte de Tous Vents or the heights of Mal Acquis.

A loop with several faces... You start along a river and a pond. You then climb up a path to cross a section of the Rambouillet Forest where there are some remarkable trees. You finish through reeds and along a pond.

A route mainly through forest, with some remarkable trees and a beautiful pond, and a heritage detour through the hamlet of Loireux.

Hike along steep paths then through the narrow streets of a picturesque village.

A very varied hike, showcasing the best features of the Hurepois, a small natural region in the south-west of the Ile-de-France. It starts with a few villages rich in heritage: churches, a castle, a keep, wash houses, etc. It continues through meadows with numerous horses. The hike ends with a very pleasant walk through the woods.

A hike with varied landscapes. The route is mainly through the undergrowth of a beautiful forest with sections along the riverbank. 07/08/2023 Moderator's note: hike modified at point 2 to avoid private property.

A loop around the Bois de Montabé, following the edge of an old railway line, a short section across fields and ending on paths and lanes. A walk to get some fresh air in the afternoon.

A hike on both sides of the Rémarde River, between meadows, fields and woods in the Hurepois region. There is a castle on the route and another at the start.

In the heart of the Hurepoix, a hike to discover the Château de Courson (16th-17th centuries) and the church of Saint-Maurice-Montcouronne (12th-16th centuries). A route through fields and woods, dotted with a few streams.

A beautiful hike to discover the beautiful sights of the Chevreuse valley: the Chatillonmill, the castle of Dampierre, the blacksmith’s, the villages of Fourcherolles, Senlisse and Choisel, Méridon castle, the village of Chevreuse and its small bridges along the Yvette, and Château de la Madeleine.

Discover Dourdan and its national forest.

A hike from station to station, crossing the Dourdan Forest, the Bois de Saint-Benoît, the Bois de Pinceloup and the southern part of the Rambouillet Forest. Several lakes adorn the route and the church of Saint-Arnoult-en-Yvelines adds a superb touch of heritage.

This hike will take you from castle to castle in the Chevreuse Valley: Coubertin, Méridon, Breteuil, Dampierre and La Madeleine. You will also discover Chevreuse, its small bridges and its Saint-Martin Church (with its remarkable ambulatory) and the surrounding countryside. The hike can start from Chevreuse or from the RER B station at Saint-Rémy-les-Chevreuse (departure and return details in italics). In this case, add 2 km to the length of the hike.

A lovely woodland walk with a cultural touch.

The first part of the route follows the upper reaches of the Orge river in a very bucolic setting. The second part is on a cultivated plateau with extensive views. The end of the route is in the forest, with beautiful trees here and there.

A hike from station to station where you play leapfrog with the Yvette River! The route is mostly close to the river and crosses a few woods and pretty parks, including the one in the western part of the Paris-Sud University campus.

From the RER B station at Saint-Rémy-lès-Chevreuse, visit the 11th-century medieval castle (1030) in Chevreuse and its ramparts, with a view overlooking the Chevreuse Valley. A day of nature, sport, excitement and gastronomy awaits you.

The first part of this walk alternates between woodland and fields. The return journey is through undergrowth, along the former railway line that used to link Saint-Rémy-lès-Chevreuse and Limours.

This magnificent route will allow you to discover the wonders of the Chevreuse Valley, passing through the Domaine de Coubertin, the Meridon Departmental Forest, the Bois du Vossery sandstone quarry, the village of Chevreuse with its shopping streets, its church, the Promenade des Petits Ponts and its medieval castle.

The first part of the hike takes in many points of interest. The second part offers a route through forest and quiet country lanes. This circuit is not recommended for young children as it includes some very steep and stony paths.

A short route to discover the village and the surrounding countryside, for nature lovers. Along the way, there are several beautiful viewpoints along the Orge river and a final stop at the Chateaupers farm.

The undergrowth is dotted with flowers in March and April and there are remarkable trees all along the route.

At the heart of the Chevreuse Valley Natural Park, a hike that allows you to wander through a protected natural site with a trail laid out by the Park. In the Bois de Maincourt, one can see ancient sandstone quarries. The course of the river Yvette, which the trail follows on the way back, finally allows a patrimonial approach with old mills and old washhouses.

Loop around the source of the Yvette at Les Essarts-le-Roy.

A hike from station to station that takes us to the source of the River Yvette and then up and down through the woods that frame its valley. The route crosses the Maincourt Marsh and then an area of rocky chaos. The forest trails are interspersed with villages and hamlets rich in heritage.