A circular walk from Saint-Germain-de-la-Grange to Mareil-le-Guyon

Start from the car park at Saint-Germain-de-la-Grange Town Hall. For access by train, see the practical information.

(S/E) Take the path running to the left of the town hall. Turn left onto the street. Walk to the end of Rue de la Mairie until you reach the ‘Stop’ sign. Use the pedestrian crossings to follow the grassy path beyond the barrier. Turn left.

(1) At the junction, turn right to follow the^GR®1, marked in red and white. At the end, turn right onto the footpath. Cross the road carefully and continue through the fields. Ignore a path on the right. At the crossroads, head straight down. Pass a path on the right, then another on the left. Follow the road to the left. Further on, take the path on the right.

(2) At the end, turn right. Go under the railway line, then turn left. Follow Rue Charles de Gaulle to the right.

(3) At the junction, cross the D191 with care. At the stop sign, follow the road to the right. Cross the Mauldre. At the church and at the end of Place Sully, turn left onto Rue de la Libération. Pass Rue aux Moutons. Ignore Ruelle de la Poste. Pass two one-way streets coming from the right. Cross the stream, Le Lieutel.

(4) At the junction, carefully take the one-way street to the left of the oratory. Cross the railway line. Continue to the stop sign. Carefully cross the D912 and turn right. At the roundabout, take the first road on the left. Cross the bridge over the N12.

(5) Leave the red and white markings here by taking the track on the left at an acute angle. Ignore a path on the right. At the road, turn left and walk carefully alongside the D191 for about 200 m. Before the bridge over the N12, take the track on the right.

(6) Cross the D34 to head straight across into the fields. The narrow path runs alongside some copses. When you see a ruined farm, go to the right of the clump of trees to avoid having to climb over a fence on the path. Keep left and follow the D23 very carefully.

(7) Cross the Mauldre. Leave the D23 by keeping to the right onto the first path.

(8) Enter the cemetery and leave via a passage on the left. Follow the road to the right. Turn left onto the first path. Ignore a path on the left. Take the first turn right then left. Ignore the dead end. Keep left at the Fork in the road. Take all the steps on the left along Rue de la Galeterie.

(9) Keep left at the Fork in the road. Turn right into the woodland and follow the yellow markings. Keep left, then ignore a path on the left. Turn left at the junction. At the roundabout, take the^second exit to reach the end of Rue de la Butte à Madame.

(10) At the crossroads, head up into the woods opposite and cross the road. At the junction near a picnic area, turn left. Go straight on at the next crossroads. The path leads to a roundabout.

(11) Follow Avenue de la République. Turn left into the cul-de-sac. On the descent, keep to the right at the Fork in the road. At the bottom of Chemin de Bricassard, turn right. At the Stop sign, keep to the left then take the path on the right. Turn left onto Rue de la Gouttière. Ignore the paths coming from the right or left.

(12) At the end of the steps, turn right. Turn left onto Rue Traversière. Walk between the town hall and the church. Head down to the left into the car park, then at the far end of it, take the steps. Turn right. Head down to the left along the Sente de l’Orme Imbert and cross the road to continue along the same path.

(13) Ignore the paths branching off to the left. After the picnic area, head down to the left. At the car park, turn right onto the Sente des Écoles. At the end, turn left and keep left, then turn right. Follow the Sente du Sac à Vin to the right. Turn left and head straight down at the junction. Ignore a path on the left. Return to the junction you passed on the way there.

(2) Leave the path on your right. Go under the railway line and turn right. As you cross the railway tracks, first turn right then left. At the end, turn left. Then turn right, cross a path and keep to the right at the Stop sign. Do the same at the ‘Give Way’ sign. Ignore the square on the left. At the Stop sign, head left to return to the town hall car park (S/E).

Access to the walk:
- By car: park in the car park at Saint-Germain-de-la-Grange Town Hall. Please note that this car park has limited capacity; if it is full, look for a parking space in the adjacent streets.
- By train: Villiers-Neauphle-Pontchartrain station, Transilien line N (Paris Montparnasse network). For timetables, visit the Transilien website. Follow the street opposite the station. Turn right, then at the junction (3), start the walk by turning left onto Rue Charles de Gaulle.

(1) The circular walk from Feucherolles to Saint-Germain-de-la-Grange follows the GR®1 from Feucherolles to this point.
(5) The circular walk from Méré to Carrefour Baron follows the^GR®1from this point to Carrefour Baron in the Rambouillet Forest.
(8) Robert Dalban (one of the best-known supporting actors in French cinema) is buried in the Jouars-Pontchartrain cemetery, in the family tomb of the producer Alain Poiré, his friend.