The walk starts from the car park of the École Jean-Paul Riopelle, Place Jean Moulin.
(S/E) With your back to the car park, head towards Rue de l'Église and turn left. Cross the car park of the Town Hall and take the stairs to the left of it. Continue along Rue de la Croix-Blanche, then turn right into Ruelle des Moulins. Cross the D 147 with caution and take the path marked in white and red opposite. At the bottom of the path, turn right onto Rue des Fraîches Femmes. At the end, turn left onto Rue du Château, then left again onto Rue Soignée to reach the banks of the Seine.
(1) Walk along the Seine as close as possible to the right, after crossing a small bridge, until you reach the ferry that takes you to Lavacourt. Continue along the path that goes uphill, turn right and go up to the left along Rue du Port, then continue along Avenue Claude Monet. Turn right into Rue du Pontceau, then left into Rue de la Seine. Cross Avenue Claude Monet and climb the steps leading to the church. Walk past the church and turn right up Rue du Cimetière (white and red markings). Turn right onto Chemin des Champs-Mondeaux (sign).
(2) Just after No. 7, at a crossroads, turn right down a small path, then at a fork, go left to reach Rue du Moutier, which you will take on the left. A little further on, go back and forth along Impasse du Lavoir on the right, then continue to a T-junction.
(3) Cross the D100 and take the alleyway opposite under a porch (10 bis). At the T-junction, go up to the left and then turn right (yellow marker) onto Chemin de Chaudry. Continue straight on along Chemin des Vignes, ignoring a turn-off to the right (PR®), until you reach a tarmac road.
(4) At the crossroads, turn around and head back opposite (yellow marker) to 19 Chemin de la Vallée (wash house). On your return, continue along Chemin de la Vallée until you reach the D147.
(5) Cross it carefully and climb up the small path opposite. Ignore a turn-off on the left.
(6) Immediately afterwards, take the Sente des Prémoirs (sign) on the left to the cemetery.
(7) At the corner of the cemetery, ignore a path branching off to the right and continue along Chemin des Champs-Crosniers, which turns north-east.
(8) At the T-junction, turn right onto Rue de Villeneuve, then right again onto Route de la Vallée du Roi. Ignore a turn-off on the right.
(9) At the fork, go left up Rue de St-Cyr, continue along Route de Vienne-en-Arthies and turn right with theGR® at the next fork (white/red markings).
(10) At the stop sign, turn right onto theGR® trail along Rue du Parc to enter Saint-Cyr-en-Arthies. Continue to the entrance of the château, passing Allée des Tilleuls on your left, then a little further on, make a short detour to the left along Rue de la Grande Vallée (wash house). Continue towards Vétheuil along the GR® trail.
(11) Turn right at the corner of the château's surrounding wall (sign for hotel or motel on the wall). At the next crossroads, continue to the right, still following the wall. Ignore a turn-off to the right to reach Route de la Vallée du Roi, which you will take to the left.
(12) After about 100 metres, turn left onto a yellow-marked path, crossing a small bridge. Continue until you reach Rue des Moulins and continue straight ahead.
(13) When you reach Place Roger Coquoin (there is a wash house on the right), turn left onto Rue du Chesnay, cross the D 913 with caution and continue straight ahead. Immediately after the edge of the woods, at a crossroads, continue straight ahead. The path on the left does not appear on the map and the one on the right veers off (red sign saying "chemin privé" [private road]). Further on, walk past the Vaulézard farm on your left.
(14) Turn right at the hairpin bend and, at the next fork, go left.
(15) At the crossroads, continue straight ahead (no fires and no motor vehicles signs) until you reach theGR®2(white/red markings) and turn right at the hairpin bend. Continue until you cross the tarmac road of Les Noues, which you will take to the right.
(16) After about 100 metres, turn right onto a small path that goes uphill. At the T-junction, turn left and then continue right onto the Chemin des Croiselles. Opposite No. 14, take the Colette path, go under a porch and turn left, then immediately right onto Rue de l'Église to quickly find the starting point on your right. (S/E).



