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Port-Cergy walks
The Oise River near the Cergy-Neuville Leisure Centre
Visorando Member
12.24 mi
+515 ft
-531 ft
6h 05
Difficult
Departure from Éragny (Val-d'Oise)
The Cergy-Neuville Leisure Centre is located in a loop of the Oise River. The hike crosses the centre, giving you an idea of the variety of activities on offer there. It continues along the slopes of the right bank of the river, offering beautiful views of the entire meander. The passage through Port-Cergy, as well as several heritage sites (churches, wash houses, covered walkways, etc.), adds to the interest of the walk.
From Cergy to Valmondois along the Oise
13.98 mi
+253 ft
-528 ft
6h 40
Difficult
Departure from Cergy (Val-d'Oise)
A hike from station to station with the Oise as the guiding thread. You will cross several wooded parks and follow the river for a long time, mostly on a right of way. At the end of the route, the passage through Auvers-sur-Oise is an opportunity to evoke the famous painter Vincent Van Gogh.
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.
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.
Walks near Port-Cergy
Along the banks of the Oise from Maurecourt to Andrésy
5.93 mi
+299 ft
-285 ft
3h 00
Easy
Departure from Andrésy (Yvelines)
A lovely, flat route to enjoy at a leisurely pace along the banks of the Oise, with a section high up behind the Pays de Maurecourt offering magnificent views of the Oise. This region is even more beautiful when viewed from the footpaths.
Andrésy Naturellement - Route de la Seine
4.05 mi
+56 ft
-59 ft
1h 55
Easy
Departure from Andrésy (Yvelines)
What could be more relaxing than discovering the architectural, historical and natural heritage whilst strolling along the Seine... A route suitable for everyone, young and old, which will take you from the Fin-d’Oise district, the historic heart of the river trade, to the Denouval district, passing by the main monuments in the city centre.
From Achères to Achères via the Forêt de Saint-Germain and the Étang du Corra
9.78 mi
+135 ft
-72 ft
4h 35
Moderate
Departure from Achères (Yvelines) (Yvelines)
A station-to-station walk, which can also be done as a slightly shorter loop. The route is mainly woodland, using both signposted paths and little-travelled paths in the undergrowth. The Étang du Corra, a protected site, offers an interlude with beautiful views and the chance to spot many birds.
From Verneuil-sur-Seine to Cergy via the Hautil Forest
10.58 mi
+866 ft
-584 ft
5h 35
Moderate
Departure from Verneuil-sur-Seine (Yvelines)
A hike from station to station which, with a few climbs, leads from the Seine valley to the Oise valley. After the streets, alleys and paths of Triel-sur-Seine and Chanteloup-les-Vignes, you cross the Hautil Forest in a very pleasant way. Three beautiful churches and two beautiful farmhouses are to be discovered along the way.
From Achères to Poissy through the Forest of Saint-Germain-en-Laye
7.64 mi
+167 ft
-207 ft
3h 40
Moderate
Departure from Saint-Germain-en-Laye (Yvelines)
A hike from station to station that crosses the entire western part of the Saint-Germain-en-Laye National Forest. A few ancient crosses mark this forest trail. The route ends in Poissy, where you can admire the Notre-Dame Collegiate Church.
From Achères to Saint-Germain-en-Laye through the forest
6.89 mi
+161 ft
-0 ft
3h 20
Moderate
Departure from Saint-Germain-en-Laye (Yvelines)
A hike from station to station that crosses the entire eastern part of the Saint-Germain-en-Laye National Forest. A few crosses and oratories mark this forest trail. The route ends in Saint-Germain-en-Laye, where you can admire its castle, built in the 12th century.
From Thun-le-Paradis to Mantes via Brueil-en-Vexin
18.05 mi
+1,230 ft
-1,243 ft
9h 20
Difficult
Departure from Meulan-en-Yvelines (Yvelines)
A long hike from station to station, alternating between the banks of the Seine, forests, fields, towns and villages, offering numerous views of the Seine and the French Vexin. The route, dotted with historical landmarks, also serves as a reminder that heavy fighting took place in the region in August 1944.
From Meulan to Triel, from station to station
8.01 mi
+758 ft
-725 ft
4h 20
Moderate
Departure from Meulan-en-Yvelines (Yvelines)
A lovely walk along the banks of the Seine, passing through pretty villages such as Evecquemont. The starting point and finishing point are two stations on the same SNCF line.
From Poissy to Conflans-Sainte-Honorine via the Forest of Saint-Germain-en-Laye
11.38 mi
+154 ft
-138 ft
5h 20
Moderate
Departure from Poissy (Yvelines)
A hike from station to station, most of which takes place in the Forest of Saint-Germain-en-Laye, which we cross from south-west to north-east. It is an opportunity to walk through forests of various species and to come across two ancient crosses and two oratories. The route ends with a water theme, at the confluence of the Seine and the Oise.
Banks of the Seine from Les Mureaux to Conflans-Ste-Honorine via the Bois de l'Hautil
11.79 mi
+522 ft
-505 ft
5h 50
Moderate
Departure from Les Mureaux (Yvelines)
The walk begins with a very varied section of the GRP® "la Seine impressionniste", starting with the imposing ESA Ariane rocket factory and its loading dock, a charming marina, the Île de loisir du Val de Seine, and several very large ponds. It continues through Triel-sur-Seine, with its pleasant Parc Senet and the architecturally intricate St Martin’s Church. The walk through the Bois d’Hautil along easy yet unspoilt paths is well worth the detour for its chestnut forests dotted with a few fine oaks, and punctuated by a large number of sinkholes resulting from the collapse of underground quarries. And we finish off gently, admiring the confluence of the Oise and the Seine.
⚠️ User comment on 18 May 2026:>Please note: at point 8, the path is closed in both directions due to reported risks of collapse; instead, take the GR®2 further down to cross from east to west