Église Notre-Dame-de-l'Assomption (Gaillon-sur-Montcient) walks

A long hike from station to station that veers away from the Seine Valley (which is not particularly suitable for hiking in this area) and climbs to higher ground. The route alternates between wooded sections and stretches through fields with sweeping views. There is a wealth of heritage to discover, with two beautiful Romanesque churches in the first part and, towards the end and as a grand finale, the Gothic Collegiate Church of Mantes-la-Jolie.

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.

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.

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

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.

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.

On this walk from station to station, you’ll stroll through the countryside, passing through small woods and hamlets. You’ll enjoy some lovely views as well as heritage sites.

A walk along the Seine from Triel-sur-Seine to Gargenville, taking in footpaths, narrow streets and the Île de Loisirs du Val de Seine, with panoramic views over the plain. Castles, wash houses and ponds are all waiting to be discovered along this route.

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.

The walk takes you through a string of pretty villages, each with its own church boasting distinctive architecture and, for the most part, also home to a castle, the most remarkable of which are those at Guiry-en-Vexin, Théméricourt and Viry. There are also several museums along the route: the Archaeological Museum, the Tools Museum, the Harvest Museum and the Maison du Parc.It is also an opportunity to admire the open landscapes of this very hilly French Vexin region, where fields, meadows and forests intermingle. The calcareous meadows are particularly striking in spring due to the abundance of flowers found there.