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Start at Le Saut du Postillon, on the D948 road, west of the village of Soisy-sur-École. Parking is available on the side of the road opposite the restaurant, between the restaurant and the "Saut du Postillon" sign further north. The restaurant car park is normally reserved for customers: if the restaurant is closed or on a quiet day, ask if parking is permitted.
Red, white and orange signs
(S/E) Opposite the restaurant, turn left (north) along the D948 road, preferably on the right-hand side. After the sign for the end of the village, turn right onto a path leading towards a wood. Enter the wood and, at the fork immediately ahead, turn right. Cross the woods at the foot of Tertre Noir, then follow the path along the edge of the woods on your left.
Red, white, orange and yellow markings
(1) At the T-junction, follow the sunken path uphill to the left.
Red, white and yellow markings
At the top of the hill, turn right and climb up under the pine trees. At the crossroads at the top of a steep slope, turn left. Stay on the contour line and go around the summit of Tertre Blanc on the left. Then begin the descent.
(2) At a T-junction, turn left. Descend, keeping north-east, ignoring a path on the right (not shown on the map). At the bottom of the descent, at a T-junction, turn left. After about 150m, turn right at the corner of a fence and walk through some undergrowth dotted with a few huts. At the T-junction, turn left. At the next junction (elevation 81), turn right.
(3) Just before reaching the D141 road, turn left and go through a forest gate. Follow a shaded path in the forest heading north-northwest. At a junction, continue straight ahead. Ignore a vague trail on the right and continue to a three-way junction.
Red and white markings
(4) Then turn left at an acute angle. At the fork that appears after about 100 metres, take the right-hand path. Ignore a path on the right and, at the next junction, continue straight ahead. Leave the woods and cross the D948 road (busy road).
(5) Go through a forest gate and enter the Forêt des Grands Avaux. Ignore a path on the left and climb up, briefly following a fence on your right.
(6) At a fork (plot no. 14), take the narrower path on the right.
From this point to the point (8), the route is very winding between the rocks, and it is impossible to provide a precise description. Follow the markings, which are fortunately very dense on this section.
After the fork, leave a few rocks on your right and cross a vague path. Further on, turn right onto a wider path which soon gives way to a trail climbing between the rocks and equipped with a few wooden steps. At the top, in a small clearing, turn left.
Red and white + blue markings
(7) Continue between the rocks and pass a first viewpoint on the left. Continue west and pass a second viewpoint. Descend, cross a small sandy area, climb up opposite and cross a maze of rocks.
Red and white markings
At the top of the hill, turn left (ignore the blue markings that veer right). Pass a few large boulders on your right, then veer right to begin the descent. Cross a path, climb briefly up a rocky platform and descend on the other side. Veer right towards a road and ignore a path on the left.
(8) Before the road, take a hollow path downhill to the left. Continue along a narrow lane (Chemin des Postes) with a hedge on your right. At the first crossroads, continue straight ahead and go to the stop sign. Then turn right onto Rue de la Couture. At the next crossroads, turn left onto Rue de Milly and immediately after, turn right onto Rue du Gazon. Go up the street, ignoring Rue du Puits on your left.
Yellow signposting
(9) At the crossroads (bus stop), turn left into Rue de la Justice (leave theGR®11trail on your right). Follow the street until you reach a fork with a reservoir in the centre. Then turn left onto a farm track and go around a field on the left. At the end of the field, continue straight ahead with a fenced meadow on your right, then a field. You will come to the edge of the underground aqueduct of the Vanne and Loing rivers, level with a row of trees on your right.
(10) Turn left and descend steadily along the underground aqueduct.
N.B. There are two paths on either side of the bench: the signpost indicates that you should follow the one on the right (downhill), but both paths meet at the bottom.
At the bottom of the descent, turn right (west-southwest) between two fields. Then walk along a wood on your right and enter the wood. At a fork, take the left and climb under the pine trees, ignoring the vague paths on either side. Wind your way along a sandy path with a few rocks protruding from the ground, in an undergrowth of ferns and heather.
(11) At the T-junction (small wooden barrier), turn left. Head east, ignoring paths on the left and gates to private land on the right.
Yellow + orange markings
At a junction (sign for "Chasse Soisy" high up on the right), turn right. Continue to a crossroads.
Red and white markings
(12) Take thefirst path on the left. Descend gently at first, then more steeply in a bend to the right. At the T-junction, turn right, continuing downhill. Ignore a path on the left and you will come out onto the D948 road. Follow it to the left and you will immediately return to the starting point (S/E).
Visorando member
Difficult 
Easy 
