From Villiers-Saint-Frédéric to Feucherolles

Start the hike at the Villiers-Saint-Frédéric RER station.

No markings

(S) Leave the station with it on your left, then turn left up Rue de la Gare. At the level crossing, cross the railway line. Continue along the tracks, turning immediately right until you reach the bridge.

(1) Go under the bridge and keep left until you reach the road. Go down this road and take the first path on the right. At the Y-junction, go left. Ignore one crossroads and continue to another at the power lines in a place called Les Soixantes.

(2) Keep going straight ahead and stay on the same path at the next intersection. Cross a road at Champ Cornu to reach a crossroads near Chatron.

(3) Descend to the left. Ignore a fork and reach a road.

(4) At this point, the IGN maps are out of date. To follow the GR® properly, turn left towards Saint-Germain-de-la-Grange. At the first crossroads, turn right down Rue de Thiverval. Cross the railway line and you will reach the Parc d'Activités de la Vallée Yart.

(5) Turn right onto the street of the same name. Continue straight ahead until you reach the roundabout. Then take the only exit opposite the roundabout to follow a track. Next, cross a second railway line, keeping to the left.

(6) Immediately after this, turn right onto a path that crosses the Ru Maldroit before crossing a road at Carrière Blanche.

(7) Go straight ahead and take the path uphill. Ignore a junction on the right and continue to the main road.

(8) Cross carefully at the roundabout and take the exit on the other side. Continue along the same road until you reach the church in Thiverval-Grignon.

White and red GR®1 markings

(9) Follow Grande Rue straight ahead. Keep right at each junction until you reach the meadows. Then continue straight ahead until you reach a gate.

(10) Turn right at a right angle. Then continue straight ahead until you reach Davron church.

(11) At the church, take the street closest to it (Rue de Wideville). At the crossroads, turn left, then left again at the next one to take Rue de Bullion. Follow this street until you reach the main road.

(12) Cross carefully and continue straight ahead on a track that gradually climbs. You will reach a crossroads in the woods at the top of a hill.

(13) Turn right. Join a wider track that branches off to the right, before turning left at the crossroads to cross a bridge. Then continue straight on to the church in Feucherolles. Go around the church on the right to reach Grande Rue. This is where the GR®1 officially ends. To reach the bus stop, as suggested by this hike, turn left onto Grande Rue and walk up to the "Mairie" bus stop (E).

To return to Paris from the arrival point (E), take the bus to Poissy, get off at Poissy RER station and then take the RER A to Paris.

Please note: some of the IGN maps are out of date between (4) and (6). To cross the railway line and follow the GR®1, you must therefore follow the description and the suggested route.

Be careful when crossing the roads at (8) and (12).

The churches of Thiverval-Grignon (9), Davron (11) and Feucherolles towards (E)