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Departure from the Granges de Port-Royal car park. On the small access road from the D91 south-west of Voisins-le Bretonneux, pass the "no entry after 9pm" sign and find the car park on the right.
There are numerous signposts along this route.
Without signposts
(S/E) Facing the buildings, turn left and follow the access road to the car park in the opposite direction. At the stop sign, follow the D91 to the right for a few metres.
Yellow signposts
When you reach Chemin des Mollerayes on the opposite side, turn right onto Chemin de Jean Racine (signposted "Passage piétons"). Go through a forest gate and continue downhill, keeping to the right-hand fence.
Yellow + blue and white signposting
(1) At the bottom, turn right towards the Cent Marches, still on Chemin Jean Racine. Walk along the wall of the former Port Royal Abbey on your left and enjoy the beautiful view through a large gap. Continue along the wall and ignore the path that branches off to the right towards the Cent Marches.
(2) After the last building (dovecote on the left), continue along the slightly uphill path and ignore a few paths leading off to the right on a steep climb. At a fork (clearly marked on site but not shown on the map), take the right-hand path (the narrower one). Gain a little height and go around a few fallen trees (for an alternative route, see the practical information).
(3) At the junction with a steep path descending to the left towards a path that crosses the Rhodon, continue straight ahead (west). Climb gradually and note the stream below. Keep away from it and climb a steep slope dotted with birch trees. At the top, turn left and stay at the edge of the slope, which is fairly flat. Ignore a path on the right and descend slightly.
Blue markings
(4) At the next crossroads, continue straight ahead towards Le Mesnil-Saint-Denis. Climb gently, always staying on the edge. Cross a very narrow railway line running close to the ground (perhaps the remains of an old quarry?) and turn left. Wind your way up and down slight inclines and descents until you reach a junction at the edge of plots 21 and 20.
No signposts
(5) Follow the wide path to the right, heading northeast. At the Minière crossroads, take the third path on the left (bridle path, yellow cross) towards Chêne Brûlé.
(6) At the Carrefour de la Mare Savin, immediately turn right onto a forest track (north-east). Pass a forest house on the right and continue to the Carrefour des Huit Routes.
(7) Then take the second road on the right towards Port-Royal. Follow this very wide gravel road flanked by two streams and, at the crossroads, continue straight ahead towards Port-Royal. At the next fork, continue straight ahead, still on the wide gravel road. Ignore a path on the left, walk along a plot of birch trees on your left and leave the forest. Walk along a field on your left and continue along the road until you reach the car park (S/E).
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