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The walk starts from the small car park opposite the restaurant at 5 Chemin de la Maladrerie.
(S/E) Head south-west towards the Étangs de Manon via the Chemin des Bilheux and follow theGR®11(marked red and white) which follows the course of the Vaucouleurs. Pass the hamlet of Les Petits Bilheux, continue along the river and arrive at the hamlet of Les Bilheux. Do not take the first street on the right and continue until you reach a wash house.
(1) At the wash house, turn right onto the road that climbs uphill. At the crossroads at the top, turn left onto Chemin de Crevecoeur (tarmac road). Cross the D11 (Route de Dammartin) and continue straight ahead on Rue du Moulin de la Planche, towards Courgent. At the fork that follows, turn left (do not take Rue Neuve).
(2) At the next crossroads, continue straight ahead, ignoring the Rue de la Maison Blanche where theGR®11branches off. Follow this road uphill to the entrance to Courgent, ignoring the road on the right towards the cemetery.
(3) Shortly after the sign for Courgent, at the town hall, turn left onto Rue du Bois Lainé, towards Septeuil Houdan. At the next crossroads, do not take Rue du Château d'Eau or Rue de la Tournelle, but continue straight ahead on the same road towards the fields.
(4) At the bend, just before the exit from Courgent, turn left onto the path after the fence. Follow this path, turning right at all intersections. After the right-angle bend, on the left, there is an esplanade with an old stone orientation table, which is almost illegible. Continue and turn right and left, then continue along the road until you reach the D983.
(5) Cross the D983 and turn left into the street that descends towards Septeuil. At the tennis club, leave the street and turn right onto the path that descends towards the tennis courts. Pass between the courts (two on the left and two on the right), then descend through the grass towards the path that can be seen below. Follow this path on the left towards the football pitch. Walk along the pitch and continue towards the park exit, passing the children's playground.
In Rue du Parc, turn right onto the bridge over the Flexanville river, which will take you to the square in front of the town hall in Septeuil. Cross the square towards the war memorial and go up Rue Contamine. At the crossroads, turn left into Rue Georges Duhamel and follow it until you reach the church.
(6) Turn right towards the church and take the path that climbs up alongside the church on your left. At the top of this path, turn left onto Chemin de Bellevue. After about 100 metres, turn right onto the path that climbs uphill. At the top of this path, turn left onto Rue du Four à Chaux.
At the next crossroads, turn right, then left onto Route de Saint-Corentin.
(7) Follow this street for about 1 km. It passes near the former Saint-Corentin Abbey, whose site is now occupied by a private castle.
(8) Shortly after the old abbey, at the Y-junction, turn left onto what is still called Rue de Saint-Corentin. This street leads to the grounds of Rosay Castle. When you reach the gate, turn left onto the path that descends alongside the castle wall. At the bottom of this path, continue along the wall, turning right. This path descends towards the D983.
(9) At the bottom of the path, turn right onto the D983 and continue along the castle wall.
(10) Take the first road down to the left. As you cross the Vaucouleurs, you will see an old water mill on your right. The road leads directly back to the car park at the starting point (S/E).
Nice walk with the family and children aged 5 and 9
Visorando member
Moderate 
