Sagy (Val-d'Oise) walks

A loop starting from Vigny via Théméricourt and Avernes.

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 loop starting from the National Scout Centre in Jambville. The very hilly route is marked in yellow.

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.

At the southern edge of the French Vexin, a loop that starts along the Montcient river, with the old Moulin Brûlé, and then alternates between ascents and descents in the woods or between fields.

In the southern French Vexin region, this circuit takes you through fields and woods, playing leapfrog with the River Montcient. The Cave aux Fées, a covered passage dating from 2500 BC, bears witness to ancient human occupation. A dovecote, an old water mill and several wash houses are also worth seeing.

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.

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

Starting from the charming village of Brueil en Vexin, you will pass La Cave aux Fées, a Neolithic burial site dating from around 2000 BCE. Then, through a varied, hilly landscape, you will discover a few hamlets and a village with its wash house and old bridge.

A short hike in the rolling landscape of the French Vexin, among woods, fields and meadows that are home to many horses.

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.

The French Vexin region has numerous megalithic sites dating from the late third millennium B.C. This walk gives you the chance to visit a dolmen in a perfect state of preservation. As you stroll through the fields and woods, you will also be able to see some lovely churches and castles.

The first part of the circuit from Bures to Chapet passes through fields along farm tracks, then crosses Chapet and reaches the hamlet of Brezolles, before returning through the woods

Discover three pretty villages in the French Vexin region with beautiful churches, a stunning castle and varied landscapes of fields, sunny hillsides and even pine forests.

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.

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 mainly forest route which, as it winds its way through villages, passes no fewer than four castles dating from the 15th to the 18th centuries.

This varied walk invites you to discover some aspects of the Vexin region: charming villages full of flowers, rolling countryside, small streams, refreshing woodland, varied flora and a Gallo-Roman site.

This walk, half rural and half woodland, takes you to 11 wash houses scattered throughout pretty villages in the region. They are of various designs and styles, most of them decorated with flowers, some of which are quite complex in design and/or large in size, offering clear, refreshing running water (although not drinkable), which is much appreciated when temperatures rise above 30°C. Two views of Mantes-la-Jolie and its cathedral, and the chimneys of the Porcheville power station often in view.

This lovely walk takes you to a Neolithic menhir called the Pierre Frite, then to a small, well-preserved castle set in lush green surroundings. Beautiful rolling landscapes can be enjoyed throughout this hike.

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 former royal hunting ground, the forest of Saint-Germain-en-Laye now offers beautiful high forests with a variety of tree species. The proposed route, marked by old crosses and oratories, reflects this diversity.

A mainly forest route, alternating between wide paths and trails winding through the undergrowth. An opportunity to discover a charming pond and explore a well-maintained botanical trail.