Allée couverte de la Pierre Plate walks

La randonnée se déroule d'abord à travers la Forêt de Carnelle, avec un passage à la superbe Allée couverte de la Pierre Turquaise, la plus imposante d'Ile-de-France. On continue en forêt puis à travers champs, pas loin de l'Oise, pour une visite à l'ancienne Abbaye de Royaumont. On termine entre bois, prés, champs et zones résidentielles.

A walk starting from Valmondois towards Ogivaux Castle and Moulin le Roy, then heading towards L’Isle-Adam through the woods. A stroll along the left bank towards the new port of L’Isle-Adam, then a walk around the lake, and continuing along the banks of the Oise via the GR®1 greenway.

Visit Royaumont Abbey via Viarmes and Luzarches, following the GR®655 circular route, for a wonderful day out with the family.

A very beautiful route from station to station in the Montmorency Forest, based in part on four themed trails: “Le Sentier des Lisières”, “Le Sentier de la Reine Hortense” and “Le Chemin des Philosophes” described on the Saint-Leu-la-Forêt tourist information website, plus “Taverny par les Sentes”. Thanks to a number of information boards, the route allows you to trace the region’s ancient and more recent history, admire many of its most interesting sites, and even engage in a bit of philosophy. It can easily be shortened to 18 km by avoiding the return trip to the Statue of Notre-Dame de France at the start of the walk.

A circular loop from station to station accessible via line H. Starting from the town of Bouffémont, it takes you into the Montmorency Forest and on to the Château de la Chasse and its pond. Before and after the château, the route follows various forest trails in the shade of century-old trees.

The ninth stage, entirely in the Oise department, of the Grand Tour of Île-de-France on the GR®11, between the stations of Bornel-Belle-Église in the Esches Valley and Cires-lès-Mello in the Thérain Valley. It consists of a crossing of the Pays de Thelle, from west to east, in the south of the department, and always through magnificent varied landscapes, between woods and fields.

A walk through some woodland, passing through Saint-Leu, Montlignon, Montmorency, Saint-Brice-sous-Forêt and, finally, Écouen. A lovely way to spend a day with friends or family – and why not stop off at a good restaurant in Piscop before finishing the route? 17/02/2026: Route change between (11) and (12) to avoid a road closed to traffic.

Starting mainly in the forest and then crossing fields on good paths, this hike from station to station has its share of remarkable sights. You can enjoy an old market hall, two beautiful churches, a dovecote, a spring and a menhir, as well as a natural curiosity, the two intertwined trees in the Forest of Coye.

A walk from station to station, following the river. After skirting the Oise to Port Cergy, the route joins the Île de Loisirs de Cergy, then takes the Axe Majeur to reach the old Pontoise–Poissy railway line. After the confluence, it follows the Seine along the quays of Conflans-Sainte-Honorine, following part of the discovery trail, before reaching the station.

A hike from station to station in two stages. In the first stage, you stay at a higher elevation and enjoy beautiful views of the Seine and its valley. In the second stage, you stay closer to the river. The beautiful Saint-Martin Church in Herblay and the important river transport industry in Conflans-Sainte-Honorine add to the charm of this hike.