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The hike starts on Rue du Pavillon de Chasse de Mériel.
Parking available.
No signposts
(S/E) Take Rue du Pavillon de Chasse, with the pavilions on your right, go to the end of the street which ends in a cul-de-sac and continue along the footpath to reach the Francilienne bridge.
(1) You will enter Villiers-Adam via Avenue Aristide Quillet. Continue to Chemin du Bord Haut, where you will turn right. Follow this road, which turns left at a right angle 300 metres further on, crosses Rue du Bas des Côtes, and becomes a track at the edge of a wood. It winds its way to Rue de Frépillon (D44), which it crosses to reach a T-junction with Chemin de la Justice, which is markedPR® (yellow).
PR® (yellow) markings
(2) Turn left, then after about 100 metres, after crossing a small stream, turn right and continue to Rue de Coudray, where you turn right.
(3): At the junction with the D44 or Rue de Villiers-Adam, you will find theGRP® Ceinture Verte de l'Ile de France signpost.
GRP® Ceinture Verte de l'Ile de France trail markers (red and yellow)
Continue along Rue de Coudray, then turn right onto Grande Rue. When you reach the church, turn left onto Rue de Méry and continue straight ahead along Chemin des Effaits, which passes over the Francilienne motorway.
(4) Turn right immediately after crossing the bridge and 200 metres further on, turn left onto Chemin de la Galope, which winds its way to a housing estate where it ends at Rue Pierre Curie. Take this street on the right.
(5) After 100 metres, once you have crossed the level crossing, turn right onto Rue de l'Église. Continue to the stadium, where you turn left onto Sente du Moulin, which ends with a staircase leading down to Avenue Marcel Perrin. Continue to the right until you reach the entrance to the public promenade in the park of the Château de Méry-sur-Oise.
No signposts
(6) Cross the park, passing between two ponds. At the star-shaped crossroads, continue straight ahead and exit the park at Rue du Ba, turning right.
PR® signposting (yellow)
(7) Continue and cross Rue de l'Isle-Adam, take Chemin du Rû, pass under the railway line and 300 m after the top of the hill, at the crossroads, turn sharply left. At the next fork, turn right onto Chemin de la Faisanderie. Continue straight ahead, passing a riding school, and after a good kilometre, you will arrive in Mériel at the junction of the D1 and D9, which has traffic lights.
(8) Cross the crossroads to reach Chemin de Paris opposite, which you follow until you reach a crossroads with several paths in a hollow where thePR® turns left.
No signposts
(9) Take the second path on your right (a sign indicates the direction of the Marais de Stors Regional Nature Reserve). It curves to the left and crosses the marshy area of the Marais de Stors before climbing back up into the forest of L'Isle-Adam after passing under a ruined bridge.
At the top of the short steep climb, you will come to a path which you take to the right. A hundred metres further on, you will find the GR® trail markers.
GR® markings (red and white)
(10) Continue straight ahead on the winding path, which passes by old quarries where log railings have been installed for safety reasons. It leads to a crossroads near the large boundary wall of the Abbaye du Val estate.
No markings
(11) Turn sharply and take the path that branches off to the right and runs along the boundary wall. Stay on this path, which goes around the abbey grounds (be patient as it is very long), to reach the entrance gate on the D9.
(12) Cross the road and continue straight ahead on the path that climbs up to Rue du Pavillon de Chasse, where you parked (S/E).
Visorando member
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Difficult 
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