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(S/E) Exit the station on the north side. Walk up towards the town hall, turn right in front of it, then left and walk up Boulevard de l'Hôtel de la Ville.
Red and whiteGR®® markings
After 200 m, at the first fork, turn right onto Rue du Marais.
(1) At the end of the street, at the end of the houses, cross the road and climb up the farm track opposite. After about 300 m, you will reach the forest.
(2) Turn left along the forest. 50 m further on, the path turns to the right. You will reach a crossroads with five paths.
(3) Continue almost straight ahead north on Chemin du Marais to Oinville.
YellowPR®® markings
(4) At elevation 151, you will come to a path coming from the left. Continue along it to the right, then turn right at a right angle to walk alongside a forest on your left. You will arrive at a well-maintained forest, then between horse paddocks.
(5) At the road, turn left at the bend. After the buildings, the road becomes a path.
After about 750 m, leave the path that runs alongside the fields and take the fork that enters the forest on the right, before coming out into the fields again. You will arrive at a tarmac road with an underground reservoir on the right (before reaching the power lines).
(6) In rainy and muddy weather, take the road, otherwise take the path opposite.
(7) When you reach the village of Oinville-sur-Moncient, look for the return path on the right and walk to the church.
(8) Retrace your steps to the start of the path indicated on the left.
(7) Take this path, which passes in front of a wash house and then follows a small stream.
When you reach a good path, turn left along the exercise equipment.
Turn right in front of the town hall and arrive on the D913.
(9) Cross carefully and take the street on the right that follows the Montcient.
After the houses, the street becomes a path. Just before reaching the D 43, turn left onto the path that climbs towards the antenna.
(10) Shortly after the antenna, turn right onto the path that descends to Seraincourt and leads to the Church of Saint-Sulpice.
(11) After visiting, return to the fork.
(10) Continue on the right along the path you followed earlier, staying on the ridge and ignoring the paths that diverge to the right or left. You will arrive at the first houses.
(12) Turn left at the football pitch, cross a tarmac road (signposted Oinville-sur-Montcient on the left) and take the path opposite, which quickly becomes a dirt track. Cross another tarmac road and continue along the ridge. Pass a first crossroads at right angles at the corner of a small wood.
(13) At the next crossroads, turn left onto the path, which veers left again after a hundred metres. You will arrive at the Allée Couverte (now uncovered) de la Cave aux Fées.
(14) Continue downhill towards Brueil-en-Vexin. When you reach the D 913, turn left, then take the first right after 100 metres. Pass La Montcient (wash house on the left), then go uphill.
(15) Turn left onto Rue de l'Église, pass in front of the town hall, then turn right, leaving the Church of Saint-Denis on your left. Continue to the end of this street, turn left onto Rue de la Carrière and continue to a small square at the end of the road.
(16) Cross it and take a small path that starts with steps. You will arrive at the D130 at a crossroads. Cross carefully and take the farm track opposite (monument on the right).
The path climbs up to a sort of plateau, crosses farmland and leads back to a small wood.
(17) At the crossroads, take the path on the right that enters the woods and continue to the hamlet of La Chartre. At the road, turn right.
Not signposted
Pass a wash house on your right and continue to the Fontaine Saint-Gaucher fountain.
(18) Retrace your steps to the fork, turn right, then take Rue de Juziers on the left at the entrance to the bend. Follow thePR®® andGR®® markings. Continue along this tarmac road and pass under the high-voltage power lines.
(19) About 300 m further on, in a right-hand bend, leave the road on the left, then turn right into a lane that will be in line with the road you have just left. Continue straight ahead until you reach the fork in the road you took on the way out.
(3) Turn right to return via the same route you took on the way there to the station (S/E).
Visorando member
Moderate 
Easy 
Association / Club / Walk leader
