(S/E) From the square in front of the church (car park), turn right onto the street, then take the next right onto Rue du Bâtiment. Follow it further on when it turns right, ignoring Rue des Ecoles on your left. At the next intersection, follow it around the bend to the left, ignoring Rue de la Tour on your right. Further on, the street turns right and becomes a path.
(1) Turn left shortly after, at the farm buildings on your right, and continue along the path. Ignore the path on the left and the one leading to the covered alley. The path continues through a pine forest.
(2) When you reach the entrance to Guiry-en-Vexin, turn right at the Croix Torsadée. Pass in front of the church. Continuing on, you will see the castle on your left and the Val d'Oise archaeological museum. Continue on the D159 departmental road. You can stop on the right to taste Sophie's waffles.
Continuing on the D159, you will find the Saint Romain spring with its statue on the right.
(3) Pass in front of the Notre-Dame church and walk around the cross, which has two different sides. Take Rue Saint Romain and at the fork, turn right towards the cemetery.
(4) Take the first road on the right towards the woods. At the end, if the gate is closed, walk along the field and rejoin the path by entering the woods just before the "bend" in the field. Continue along the path to the left. Ignore all the paths on the right until you reach the road.
(5) Then turn right onto the road and continue for 500 metres.
(6) Turn onto the path that branches off to the right. Follow it, turning left at the first fork. After the farm, turn left to return to the outward route.
(1) Turn left and return to the starting point (S/E).