Montgeroult walks

A hike on the slopes of both banks of the Viosne, alternating between cultivated fields, woodland and charming villages. For about 3 kilometres, the route follows the course of an ancient Roman road, the Chaussée Jules César. There is a rich heritage to discover along the way: mills, a castle, churches, crosses, wash houses and beautiful houses.

Between town and countryside, this walk is mainly marked by yellow PR® markers.

A pleasant walk starting from Boissy-l'Aillerie station, through the wooded and grain-growing areas of the Vexin plateau.

Alternating between cultivated fields and forest edges, this hike follows the Viosne River. For a little over 2 km, the route follows the route of an ancient Roman road, the Chaussée Jules César.

Circular route which, on the outward leg, follows theGR®1from Us to Sagy. The route takes you through part of the Aubette Valley. On both the outward and return legs, you pass through the village of Vigny, home to its castle, well-known to film buffs.

A circular route which, on the outward journey, follows theGR®1from Us to Bréançon via Marines, a village in the Vexin region. The return to Us allows you to explore Cormeilles-en-Vexin and cross the Viosne, a tributary of the Oise, once again.

A mountain bike ride of around 25km, passing through fields, woods and pretty villages along the Viosne and Couleuvre rivers (Santeuil, Brignancourt, Le Perchay, Ableiges). A lovely spot for a break halfway along the route at the Étang de la Vallière for a picnic. No major difficulties to speak of, apart from a short path through the woods near Santeuil and a return route via the road from Ableiges to Cormeilles (though other options are available).

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.

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 hike begins in front of Osny Town Hall in the beautiful setting of Château Grouchy and its park bordered by a pond. The walk heads north-west to the town of Boissy-l'Aillerie, returning south and then east to the starting point via Grouchy Park. Much of the route is away from roads with motor traffic.

A circular route for a day's hike. Starting from Sagy, you will pass through Saillancourt, Villette, Condécourt, Longuesse and Vigny.

A circular route in the French Vexin, mainly through fields. Starting from the church in Vigny, the route passes through the villages of Sagy and Longuesse, each with their own church.

A loop starting from Vigny via Théméricourt and Avernes.

Come and explore the paths and forests on a circular hike that starts in Marines and passes through Neuilly-en-Vexin, Chavençon, Les Buttes du Rosne, Le Heaulme and Le Rosnel.

Pass through beautiful traditional villages, across fields and woods, via the Étang and Moulin de Vallières, ending along the Viosne.

This hike through woods and fields offers beautiful views of the Viosne Valley, a small river that flows through the Vexin Français from north to south, with interesting heritage in the village of Brignancourt and a possible stop at the edge of a beautiful pond.

Discover three villages in the Vexin region, with their splendid architecture.

The route follows theGR®1from Livilliers to Bréançon. On both the outward and return journeys, the walk passes through two villages in the Vexin region: Épiais-Rhus and Grisy-les-Plâtres. Before returning to Livilliers, the route leads to the Chapelle de Gérocourt in the commune of Génicourt.

A walk passing through three villages with their churches and houses typical of the Vexin region.

A varied hike through woods and fields with two beautiful churches in Bréançon and Le Heaulme. Lovely views over vast fields of green wheat, dotted here and there with red poppies. It's a shame there's a bit too much road.

This route is rich in history and allows you to discover the heritage of Pontoise and its little-known paths.

A pleasant walk through fields and woods. Walkers will be surprised by the changing landscapes and colours.

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.

This circular walk takes you on a journey of discovery through the four vineyards of Jouy-le-Moutier. You will learn about the past activities of this hillside with its old limestone quarries, the former CGB railway line that linked Pontoise to Poissy, the Jouy-le-Moutier menhir and two wash houses.

A 6 km circular route offering a chance to discover a different side of Ennery, on its border with Pontoise.

A short walk, where heritage sites (churches, wash houses, covered walkway) alternate with a path along the Oise river.

The route follows the Avenue Verte (Paris-London cycle route) from Jouy-le-Moutier to Vauréal. After crossing the Oise at the major axis, it returns via the Cergy ponds and the towpath to the Pont de Neuville bridge.

Set off to explore the three megaliths listed as historic monuments on the circular Oise route: two menhirs and a covered passageway, as well as the banks of the Oise, a pond, woods, a wash house, two wells, a fountain, the Axe Majeur and scenic viewpoints.

This walk takes you past numerous wash houses fed by springs located on the circular Oise in the municipalities of Jouy-le-Moutier, Vauréal and Cergy. Along the way, you will discover the Jouy-le-Moutier municipal park known as "Parc Raclet", the Rue des Blanchards and its curiosities, the old railway line that linked Pontoise to Poissy, the Axe Majeur, Gérard Philippe's house and the Cergy ponds leisure centre.

A circular route which, on the outward journey, follows theGR®1from Vaux-sur-Seine to Triel-sur-Seine. On the return journey, the route passes through Chanteloup-les-Vignes. Overall, the route circles the Forêt de l'Hautil.

A circular route which, on the outward journey, follows theGR®1from Vaux-sur-Seine to Sagy. The route passes very close to the Châteaux de Villette and Vaux. Before reaching the finish, the route runs alongside the Seine for a few hundred metres.

A water-themed hike: from the meanders of the Aubette to the springs that enliven the Vexin region.

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.

An easy loop around Commeny via Le Perchay and the Chaussée Jules César.

A walk consisting of two circular routes, starting from the beautiful church in Neuilly-en-Vexin. The route alternates between cultivated fields and woodland.

A route through the Vexin region starting from the charming Saint-Martin Church in Vallangoujard. The first half is shaded, beginning alongside streams and ponds. The second half is in open countryside, amongst the fields.

A circular starting from Maurecourt cemetery, passing through the Berthe Morisot trail, the Château du Fay, the Écancourt farm, the Bois de Jouy and returning to Maurecourt along the old railway line.

This is the eighth stage of the Grand Tour de l'Île-de-France on the GR®11, starting from Chars station in the Val d'Oise and heading towards Bornel-Belle-Église station in the Oise, through the north-eastern part of the French Vexin and the borders of the Pays de Thelle. This stage is unique in that it runs along the border between the Val d'Oise and Oise departments, with roughly 50% of the route on each side. The proposed itinerary passes through the Buttes de Rosne, the highest natural point in Île-de-France, although it deviates slightly from the GR® for this.

A pleasant and varied hike in the heart of the French Vexin. The route begins with a circular route north of Chars, between fields, meadows and small woods. After the beautiful church of Chars, there are alternating ascents and descents on the slopes of the south bank of the Viosne. The church and old mill in Brignancourt are a heritage stop before heading up the right bank of the Viosne along the edge of a wetland.

Walk starting from Chars SNCF station passing the Château de Saint-Cyr-sur-Chars. On the way back to Chars there is a narrow pedestrian passage that starts with a staircase.

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.

A very pleasant walk that begins along the surrounding wall of a castle beautifully set in its grounds. The walk takes you through the hamlet of Héréville with its beautiful houses and charming tranquillity. Although the route ends on a road, it is very quiet and the narrowness of the road forces cars to drive at a speed that makes them very tolerable.

A pleasant walk starting from the top of Andrésy towards Maurecourt and Jouy-le-Moutier along country lanes.

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.

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.

This walk can be started from Meulan-Hardricourt station and follows marked paths for a good part of the way, even if they are not always easy to identify, particularly the access tothe GR® 2. During this walk, you can see the church of Hardricourt, pass through fields, see La Défense, enjoy the undergrowth, admire the pretty village of Mézy-sur-Seine and, if you are feeling adventurous, dip your feet in the water (in summer) and enjoy the banks of the Seine. Please note that in cold weather, some sections of the forest may be muddy and difficult to walk on.

Half urban, half rural route to discover old Meulan-en-Yvelines and the views over the Aubette and Seine valleys.

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 walk that allows you to discover the banks of the Seine at the pace of the barges, first along the water's edge, then from a higher vantage point. You can also discover a rich heritage, such as the royal quarries, the Moorish house of painter and photographer Victor Madeleine (1855-1931) and the River Transport Museum.

A walk starting from the Collège des Hautes Rayes car park, to La Frette-sur-Seine, via the top of the hill, and returning along the towpath. View of the Seine.

A beautiful hike through fields to enjoy the autumn sunshine.

A short circular walk starting from Arronville. You will pass through Hérévile and cross the Sausseron twice.