(S/E) Starting from the village car park opposite the butcher's shop, head towards Chardronville, passing under the power lines to join the D28 via Rue des Prés and then Rue Pierre Bonte on the left.
Cross the D28 (be careful, heavy traffic and no pedestrian crossing).
(1) Turn left onto Chemin du Vaux Roux, continue along this path to Saillancourt, then turn right onto Chemin du Héron.
(2) Head towards the woods via the dirt track on the right and walk along the edge of the Bois du Héron.
(3) Turn onto the first path on the left, then take the first path on the right, which joins aPR® on the right. Continue straight ahead and pass through the woods.
(4) At the end, take the path on the left and when you reach a fork, turn right onto the path that descends gently. Follow the path and you will see the "Stèle" (large column on the other side of the Château de Vilette park).
(5) After a hairpin bend in the woods, you will see Château de Villette. Go down the road and continue straight ahead, slightly to the left, following the red and white markings ofthe GR®1. Pass an old mill, turn left onto Place du Moulin, then right to rejoin and cross the D28 again (use the pedestrian crossing, as there is traffic).
(6) Turn right at the pylon. The road continues along a path that branches off to the right to join Rue de la Petite Cavée in Condécourt. Turn right until you reach the D169.
(7) Continue left to cross the village via the D169 and continue straight on Rue des Champs Saint-Denis (mind the traffic).
(8) Take the first path on the right before the high-voltage line, continue on the left, passing under the line, then turn right.
(9) After the tennis courts, turn left onto the path (Paris/London greenway) and walk alongside the Petites Auges de Sagy and Maraîchère ponds.
(10) Leave theGR®1and turn left onto the D81 as you enter Longuesse, then right onto the D169. Pass in front of the church, then take the street on the left. Turn left again onto Rue des Baudes and continue to the calvary (La Croix Rouge).
(11) Turn right, at the end of the road turn right and then take the first road on the right.
(12) Turn left at the edge of the Bois de Terre Sainte, then turn right onto the path to reach the corner of the Château de Vigny wall.
(13) Cross the D169 and take the long climb opposite. Back in Longuesse, at the bottom of the descent, turn left into Rue du Moulin (you are leaving theGR®1) and continue to the cemetery.
(14) Turn right after the cemetery, follow this path, pass in front of the Musée de la Moisson and continue along the road until you reach the T-junction.
(15) Turn right at the entrance to Sagy. Before the cemetery, follow the left fork to reach the car park (S/E).