Petit Rosne (rivière) walks

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.

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 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.

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.

This route across Deuil-la-Barre from south to north connects Place de la Nation in the renovated Galathée district to Place de l'Église in the historic town centre. It takes about 40 minutes at a leisurely pace.This pleasant walk through numerous public gardens takes you to Place de l'Église (or Place de Victimes du V2), which is also the starting point for several hikes on the Côte de Deuil trails.This route is recommended by the association Les Sentiers de la Côte de Deuil.

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

A route with a slight elevation gain, starting at the banks of the Seine and the railway line, then climbing towards Parc de la Butte d'Orgemont. Pass by Moulin d'Orgemont and Moulin de Sannois, through the Buttes du Parisis regional forest and Fort de Cormeilles. ⚠️ Please note! This hike is not marked, so be sure to follow the description, map and compass.

In the footsteps of the Impressionists, an urban route mostly along the banks of the Seine, through the Parc Départemental de l'Île Saint-Denis. At the end of the route, the Basilica of Saint-Denis adds a superb touch of heritage to this short walk.

Half of the route takes you through the Forest of L'Isle-Adam. This hike from station to station offers other points of interest, including two covered walkways dating from the Neolithic period.

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.