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Departure from Saint-Nom-La-Bretèche Forêt de Marly station.
Access by train: terminus of one of the sections of the Transilien L line, Paris-Saint-Lazare network.
Access by car: park in the large car park along Route des Muses, on the other side of the bridge from the station.
White and red markings
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(S/E) With your back to the car park and facing the bridge, follow the path on the left (red and white markings) and walk along a fence on your right.
(1) At the crossroads (small stone structure housing a spring on the right), go straight ahead. At the next crossroads, go up opposite and then keep to the right (red and yellow markings).
(2) At the crossroads, turn left. Keep going in the same direction (north) at the next two crossroads. Cross Route de la Claire Forêt and go straight on until you reach the D98.
(3) Carefully cross the busy road and the cycle path on either side. Continue a few metres along the path opposite and immediately turn right. Go downhill and cross a path. At the next crossroads, take thesecond left. Go straight ahead at thefirst two crossroads and turn right atthe third.
(4) At the Étoile du Loup crossroads, take thesecond path on the left. Cross the Route des Princesses and continue straight ahead. At a crossroads, cross theGRP® (ignore the red markings) and continue straight ahead for about 100 metres until you reach the wall of the Joyenval Golf Course.
No markings
(5) Go straight ahead and follow the wall on your right for about 1 km (making several turns along the way).
(6) At the crossroads, take thesecond path on the right (leave the path that follows the wall).
(7) Join Route Dauphine and follow it to the right, then turn into thefirst path on the right.
GR®1marked in red and white
(8) At the crossroads, follow theGR®1marked in red and white, taking the path on the right.
(7) At the crossroads, rejoin Route Dauphine (tarmac) and take a straight path on the left (east-south-east).
(9) Return to the road and immediately take a path on the left. Further on, turn right twice, then left at the next junction. Cross three paths to reach the Étoile des Chasseurs. Take thesecond path on the right.
(10) Cross the Route des Princesses and, at the fork immediately ahead, keep to the right. Go straight ahead atthe first junction and turn right atthe second. Cross Route Dauphine again and, at the multiple fork, take the path on the left. Continue straight ahead, then carefully cross the D98 (and the cycle paths). Continue straight ahead, go downhill and then uphill to reach Croix Saint-Michel (viewpoint).
(11) Turn right (west). Ignore a path on the right and then on the left. Turn onto thesecond path on the left. Continue straight ahead until you reach Route des Muses. Cross carefully and continue in the same direction until you reach Route Royale. At the fork, leave the tarmac road by keeping to the left, then leave the paths that branch off to the left.
(12) Ignore the paved path and turn left. At the next crossroads, go straight ahead (steep descent). Cross Route de Noisy (D161) carefully to find the rest of the path on the left. Continue straight ahead at the Étoile Bizarre crossroads. Keep going in the same direction (east) until you reach the Étoile de la Côte fork.
(13) Turn left. Cross a path and then turn left. Ignore the steps and turn right twice. Before reaching the car park, turn left and then right to keep the Route de Saint-Cyr on your right. Carefully cross the D7, then first turn left then right and follow a small tarmac road.
(14) At the crossroads, go straight ahead into the Domaine Royal de Marly and keep left at the fork. At the three-way junction, take the middle path and continue to the next crossroads.
(15) Turn right and at the next crossroads, first turn right then left. Shortly afterwards, before reaching a road, turn left. Join a small road and follow it to the right.
(16) At the top of the green carpet (beautiful viewpoint), take thesecond path on the left after thesecond bench. Turn into thesecond path on the right. Go straight ahead at the crossroads and cross a road. Follow the tarmac road to the left and go through a stone gate.
(17) Turn left, walk along the N186 on your right and cross it atthe first pedestrian crossing. Follow Rue du Maréchal Joffre opposite, then turn right onto Chemin des Gressets. Walk past the water tanks on your right. At the crossroads at the end, turn left into the forest.
No markings
(18) When theGR®1turns right, go left in the opposite direction. Keep left immediately, then at the crossroads, go right, leaving the sloping path. Keep left twice to descend the steep path. First turn right then left. Stay on the edge of the woods.
(19) Take the passage behind the wooden barrier. Leave Rue des Bois on your right. At the four-way crossroads, leave the tarmac and enter the park. Keep to the right and then leave the path on the right. At the roundabout, take the two pedestrian crossings on the left and re-enter Parc de Marly.
(20) Continue straight ahead through the park and downhill. Cross the site of the old castle, then keep left to climb all the steps. Continue uphill in the same direction. Go around a hillock on the left, ignore the path on the left and continue to the next crossroads.
(15) Turn right and at the T-junction, follow the path on the left. Ignore the paths leading off to the left and leave the estate.
Red and yellow markings
(14) Turn right immediately (follow the red and yellow markings until you reach your destination). Cross Route de Saint-Cyr and follow a small road towards the cemetery. Before the car park, turn left twice. At the fork, keep to the right. Cross a path and then keep to the right again. Continue in the same direction (west-southwest) until you reach Étoile Douteuse.
(21) Then turn right. Carefully cross the D161 and follow the path opposite. At the end, at Étoile d'Actéon, take the first left and then turn right at the next crossroads.
(22) At Étoile Pavée, continue straight ahead. Make a first turn left then right near the railway line. At the end of the path, turn right. The path that runs alongside the railway line leads to Saint-Nom-la-Bretèche station (if necessary, take the bridge to reach the car park) (S/E).
Visorando member
Moderate 
Easy 
