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Etang des trois sources walks
From Valmondois to Persan via L’Isle-Adam
Visorando Member
8.66 mi
+256 ft
-256 ft
4h 10
Moderate
Departure from Valmondois (Val-d'Oise)
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.
Walks near Etang des trois sources
From Valmondois to Presles via the Forest of Isle-Adam and Pierre Plate
10.59 mi
+591 ft
-505 ft
5h 25
Moderate
Departure from Valmondois (Val-d'Oise)
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.
De Presles à Luzarches par la Forêt de Carnelle et la Pierre Turquaise
12.46 mi
+751 ft
-702 ft
6h 25
Difficult
Departure from Presles (Val-d'Oise) (Val-d'Oise)
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.
From Bornel to Cires-lès-Mello through the Pays de Thelle
14.29 mi
+915 ft
-932 ft
7h 20
Difficult
Departure from Bornel (Oise)
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.
From Viarmes to Luzarches via Royaumont Abbey
10.46 mi
+256 ft
-413 ft
5h 00
Moderate
Departure from Viarmes (Val-d'Oise)
Visit Royaumont Abbey via Viarmes and Luzarches, following the GR®655 circular route, for a wonderful day out with the family.
From Bouffémont to Taverny via the Montmorency Forest
13.25 mi
+971 ft
-1,020 ft
6h 55
Difficult
Departure from Bouffémont (Val-d'Oise)
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.
Circular from station to station through the Montmorency Forest and the Château de la Chasse.
4.42 mi
+407 ft
-407 ft
2h 30
Easy
Departure from Bouffémont (Val-d'Oise)
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.
De Saint-Leu-la-Forêt à Écouen-Ézanville
9.03 mi
+725 ft
-738 ft
4h 45
Moderate
Departure from Saint-Leu-la-Forêt (Val-d'Oise)
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.
From Pontoise to Conflans along the river
14.22 mi
+394 ft
-354 ft
6h 55
Difficult
Departure from Pontoise (Val-d'Oise)
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.
From Luzarches to Fosses via the Forest of Coye and the Pierre Longue
12.11 mi
+650 ft
-502 ft
6h 10
Difficult
Departure from Luzarches (Val-d'Oise)
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.
From Cergy Saint-Christophe to Conflans-Sainte-Honorine
10.63 mi
+161 ft
-410 ft
5h 00
Moderate
Departure from Cergy (Val-d'Oise)
A walk starting from the new town of Cergy will take you past the circular bends of the Oise, the Cergy leisure centre and its ponds, and the old villages of Vauréal, Jouy-le-Moutier and Neuville-sur-Oise in the Val d'Oise. You will arrive in the Yvelines at Conflans-Sainte-Honorine, the capital of inland waterway transport at the confluence of the Seine and the Oise.