Osny walks

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 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.

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

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

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

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.

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.

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.

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 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.

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.

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 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.

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.

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

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 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 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 full-day mountain bike ride through the eastern Vexin, passing through Valmondois, Nesles-la-Vallée, Labeville, Vallangoujard, Menouville, Theuville, Épiais-Rhus, Liilliers and Hérouville.

Route passing through all the natural, cultural and memory sites of Auvers-sur-Oise. Paintings by 19th-century artists, illustrated by "Le Chemin des Peintres" (The Painters' Trail).

Do you enjoy walking? Here is the ideal hike that will take you on a route full of surprises! Between town, countryside and forest, discover Andrésy as you've never seen it before: a town in its natural state!

Narrow paths, steep trails. Explore the picturesque paths and trails of the town of Andrésy. It's a different way to discover the charm of Andrésy, between town, countryside and the banks of the Seine.

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.

This route to the north of the Forest of Saint-Germain-en-Laye and near Conflans-Sainte-Honorine takes you to the Étang du Corra, a pond with rich biodiversity that is a popular spot for birdwatching. The Pavillon de la Muette is a neoclassical hunting lodge built at the request of Louis XV.

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.

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.

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.

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.

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.

This walk through the old streets of Verneuil, its parks and gardens is not difficult. The walk continues through the forest and along some of its varied paths. End of the urban route, nice little shops, cheese shop, bakery, etc. Finally, a gently sloping path leads to the station.

This route is a circular route that will take you to Saint-Martin Church in Triel-sur-Seine, the castle and church in Vaux-sur-Seine, and Verneuil-sur-Seine Castle. The climb up to the heights of Triel offers panoramic views over part of the valley. For the first few kilometres, you’ll follow the GR®1 (a 570 km circular route around Paris) before returning via the GR® de Pays “La Seine Impressionniste” and the Verneuil-sur-Seine leisure centre.

This walk, which initially follows the Seine to Villennes, will allow you to see many different aspects of the riverbanks and the surrounding area. You will then take the town’s narrow streets, before heading back down through the woods and fields to Verneuil.

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

The banks of the Seine and the hillsides in Triel-sur-Seine

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.

Hike around the villages of the French Vexin in the Sausseron valley, discovering castles and manor houses.

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 circular route through five villages in the Vexin Regional Park, partly following the old Valmondois Marines railway line, a secondary line that closed in the 1950s but whose old stations are still visible.

A beautiful walk in the French Vexin Regional Nature Park and the Sausseron Valley

The circuit starts by taking you along the Sausseron valley, then climbs up the hillside and continues through fields. You return to Nesles via paths through the woods. The circuit also allows you to discover a unique site called the Trou à Morts.

On the Vexin plateau, discover Château Molle and the Cavée du Lay. 360° views over the Vexin plateaus.

A former royal hunting ground, the Forest of Saint-Germain-en-Laye has wide, long avenues. There are also paths winding through the undergrowth, which this hike invites you to discover. The route is mainly through the forest, with a variety of tree species and a short stretch along the edge of a pond.

A trail very well maintained by the ONF for discovering different tree species! A short, easy route with excellent signposting and numerous information boards. Ideal for children (and grown-ups) keen to learn more about life in our forests.

A circular starting from Hédouville takes you through Hodan, Messelan and Frouville.