Circular Walk and Ysieux Landscape
The official “Découvrir Chaumontel” circular route begins and ends at the Church of Notre-Dame-de-la-Nativité. It is rated very easy, is 3.9 kilometres long and takes about one hour. This approximate time estimate can help you plan the walk as part of your itinerary; check trail conditions before setting out, as they may change. The route crosses a footbridge over the Ysieux. It also follows Rue de la République to view the industrial heritage along Rue de Paris. A walk leads to the Fontaine au Lion.
The Ysieux crosses Chaumontel from east to west; the town lies approximately halfway along the 15-kilometre river. Its valley was designated a protected site in 2002. Chaumontel is also part of the Oise–Pays de France Regional Natural Park, established by a decree dated 13 January 2004. The Ysieux rises in Fosses and flows towards Royaumont Abbey. This gives you a specific river and landscape to orient your walk around the town, while the river’s longer course extends beyond Chaumontel.
Church and Historic Buildings
The Church of Notre-Dame-de-la-Nativité was originally built in the 13th century and rebuilt in the 16th century. Inside is a wooden statue of the Virgin and Child dating from the late 14th century. To visit the church, you can ask for the key at the town hall or pharmacy; check this arrangement in advance. Between the church and the school, an ossuary recalls that the cemetery surrounded the church until 1854. Rue de la République is home to two 19th-century washhouses: one behind the war memorial, the other between numbers 23 and 25.
Château du Prasley is privately owned and cannot be seen from the road. Its surviving features include water-filled moats and towers of a 14th-century manor house. Nearby is the Ferme des Nonnains, within the territory of Luzarches. It was formerly called “Chaumontel-les-Nonnains”; remains of a chapel can be found at the farm.
Industrial History and Local Pear
Chaumontel’s industrial history is reflected in various traces. The former Agam Branson factory has W-shaped sawtooth roofs; next to it stands a director’s house built entirely of brick. Industrial activity began at the site of the former Moulin de Glanne grain mill, which operated until the French Revolution. In the 19th century, Chaumontel was also home to workshops producing so-called Chantilly lace.
The Bésy de Chaumontel pear is also part of the town’s history: around 1750, the château’s gardener cultivated this pear by grafting. It is considered a “beurré”-type pear, with meltingly soft flesh and a winter harvest. The combination of crafts, early industry and pear cultivation adds a history beyond the town’s buildings to your walk.
Hotel Rooms and Planning
Since early 2026, Château de Chaumontel has offered a total of 33 hotel rooms, spread across the château and a hamlet.
Discover more destinations: L'Isle-Adam, Survilliers, Saint-Brice-Sous-ForĂŞt, Sarcelles, Soisy-Sous-Montmorency, Roissy-En-France, Cormeilles-En-Parisis, Saint-Witz.
For the overview of the wider area: Val-D'oise.
