Start from the public car park on Rue du Berceau in Elancourt-village, on the left after the Mousseau farm car park, just before the sign for the Vallée Favière cemetery.
(S/E) Head to the eastern end of the car park. Turn left onto Sentier des Noyers towards the cemetery and walk along the cemetery on your right.
(1) At the end of the path, turn left onto Route de Trappes. Cross the roundabout and continue straight ahead on the same road.
Turn left onto Place de l'Église to see Saint-Médard Church. Retrace your steps.
Turn left again onto Route de Trappes, then immediately turn right towards Bassin de la Muette, following Route de la Muette.
(2) Leave the road on the left and walk along the basin on your right. At the corner of the basin, turn right. Return to Route de la Muette and follow it on the left to a pretty little square (Place de la Muette) where you will find sculptures of two magnificent cows, Annabelle and Clémentine.
Leave the square on your left and climb a very steep concrete path, which is an extension of Place de la Muette. Pass between the houses and continue up some wide steps into a small wood. Continue along a path called Sente des Gatines.
(3) At the end of this path, cross the road to enter the woods via the path that branches off to the left after the barrier. Follow it until you come to a track, which you should take to the right.
Then take a small path that branches off to the left in a hairpin bend. Start climbing the Colline de la Revanche. Shortly afterwards, take a very steep path on the right that climbs straight up to the top.
Once on the hilltop (360° view over much of the region as far as La Défense), turn left to descend via a small path heading east. Join a road closed to traffic and follow it to the right, continuing downhill.
(4) Leave this road at thesecond bend and take a road that branches off to the right after two large concrete bollards. After about 200 metres, turn left onto a path that descends into the woods.
At the T-junction, turn left. Walk alongside the allotments on your left. Once you reach the small white bevelled post on the left, descend to the left along the path that runs alongside a fence. You will come out onto a dead-end street.
(5) Follow the cul-de-sac to the left and, at the end, turn right. At the crossroads (opposite a technical centre), turn right onto Route de Trappes.
(1) At the corner of the cemetery (pedestrian crossing on the speed bump), turn left onto Sentier des Noyers, which you took on the way there. Continue straight ahead to reach the car park (S/E).