Bullion is a commune in the Haute Vallée de Chevreuse Regional Nature Park. Numerous paths and hiking trails cross the commune, allowing visitors to explore its diverse landscapes. Travelers can enjoy marked hiking routes, historic buildings, and a protected natural area near Moutiers.
Hiking Trails and Planning Your Time
The 7 km La balade du Louis d'Or is marked in blue and white. It passes through forests, meadows, and fields to Bullion, then follows the edge of wetlands. Its average duration is 2 hours and 30 minutes. The regional park regularly checks the trail; nevertheless, check trail conditions locally before setting out.
The Circuit des Valentins is a 7.4 km hiking trail marked by the Regional Nature Park. It is 400 meters longer than the Louis d'Or route, which is 7 km. This allows you to compare the two routes based on their stated lengths.
The program, updated on May 27, 2026, lists the guided hike “Paysages et vie rurale autour de Bullion” as a 7 km loop taking around 3 hours and 30 minutes; it starts at the church in Bullion. Both tours are 7 km, but the estimated time for the guided loop is about an hour longer than the average duration of the Louis d'Or route. So when planning your day, consider the specific tour, not just the distance. As program details may change, check them before making plans. The format also distinguishes the two offerings of the same length: La balade du Louis d'Or is marked in blue and white; the loop “Paysages et vie rurale autour de Bullion” listed in the program is a guided hike and starts at the church. When choosing, you can consider the format as well as distance and time: a marked trail or a guided tour.
Church, Chapel, and Natural Heritage
The church in Bullion is dedicated to Saints Vincent and Sebastian and is protected as a historic monument. It was built in several phases from the 10th to the 16th century. Its history therefore spans a long period rather than a single building phase.
In the hamlet of Moutiers, the Sainte-Anne, Sainte-Scariberge Chapel is the surviving part of a Benedictine priory documented since 1262. The date refers to the documentary record of the priory, while the church is described as having been built in phases over several centuries. The two details therefore relate to different historical time periods.
Near Moutiers, La Claye is classified as a Natura 2000 site. If you plan to visit, check local access rules.
Discover more destinations: Saint-Léger-En-Yvelines, Chevreuse, St. Arnoult-En-Yvelines, Raizeux, La Celle-Saint-Cloud, La Celle-Les-Bordes, Les Bréviaires, Boissets.
Go to the main travel guide: Yvelines.
