Refine your search for walks in Cormeilles-en-Vexin
The Chaussée Jules César and the Coteaux de la Viosne

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.
Loop departing from Chars

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.
Les Buttes de Rosne by Sarah Bernhardt

A very bucolic walk in the heights of the French Vexin, passing close to the highest point in the Ile-de-France region. A beautiful forest to cross until you reach the house that was once inhabited by Sarah Bernhardt. Return through the fields across a beautiful landscape at the edge of Picardy.
Loop around Commeny

An easy loop around Commeny via Le Perchay and the Chaussée Jules César.
Boucle du Puits Fondu and discovery of the Trou à Morts

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.
Along the Oise between Jouy-le-Moutier and Vauréal

A short walk, where heritage sites (churches, wash houses, covered walkway) alternate with a path along the Oise river.
The Avenue Verte in Vauréal, return via the Cergy ponds
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 Oise Valley of landscape painters

This hike passes through the villages of Auvers-sur-Oise, Valmondois and Butry-sur-Oise, alternating between countryside and the banks of the Oise. All these places have provided numerous subjects for landscape painters, notably Dupré, Daubigny and Pissarro, precursors of the Impressionists. Even today, visitors are struck by the charm of this region in all seasons.
The mills of Valmondois and the old railway line

A pleasant hike along the Sausseron, a small stream in Valmondois, past the mills and back via the steam tramway museum and its old railway line.
The Dolmen of Bois Couturier

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.
La Croix des Friches and the Forest of La Tour du Lay

The Croix des Friches dates from the Middle Ages and marked the boundary between the communes of Parmain and Nesles-la-Vallée. The beautiful Forêt de la Tour du Lay is home to a Neolithic polishing stone. A hike mainly through woodland, with a few sections between cultivated fields.
Around the confluence of the Sausseron and Oise rivers

A very varied hike through green valleys, cultivated plateaus and forests. Some beautiful views of the surrounding countryside and the crossing of villages with interesting architectural heritage make it very enjoyable.
La Cave aux Fées and the Côteaux de la Montcient

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.
From Achères to Achères via the Forêt de Saint-Germain and the Étang du Corra

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.
Loop in the north of the Isle-Adam National Forest
Hike in the Isle-Adam National Forest, passing through areas overlooking the Stors Marsh Nature Reserve and the large Abbaye du Val Park with its quarries, caves and Château des Forgets.
The GPX track may be useful.
Woods and castles in the French Vexin

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.
Chambly, Gandicourt, Ronquerolles loop

A 10-kilometre loop to be done on foot starting from Parc Chantemesse in Chambly. There are no major difficulties and the section along the river is very pleasant.
Loop around Brueil-en-Vexin

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.
Bures loop in Chapet
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
The Dolmen des Trois Pierres and the Réveillon Valley

The main destination of this hike is an imposing Neolithic dolmen. Passing through woods and fields, it also offers the opportunity to discover two charming villages in the Réveillon Valley.
In the forest of Saint-Germain-en-Laye

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.
Montjavoult and Parnes

A bucolic walk on the edge of the French Vexin, between woods and fields, from hill to hill. Panoramic views of the Normandy countryside.
Short loop in the south of the Saint-Germain-en-Laye Forest

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.
Épône loop to Guerville via the wash houses

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.