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Start from the car park at the post office in Champcueil, opposite the church porch
(S/E) Turn right off the church onto Rue de la Procession, then right onto Route de Noisement (road sign for Noisement, Mondeville). Continue along this road for 800 m.
The road passes between two white barriers. On either side, you will notice a strip of land slightly raised above the fields. This strip forms the embankment of the Vanne and Loing aqueduct.
(1) Take the path on the left that follows the aqueduct. After a right-hand bend at the edge of the forest, you will come to a metal barrier. Continue straight ahead, following the aqueduct and ignoring several paths and tracks that branch off to the left. You will arrive at the foot of the "hundred steps".
(2) At this point, the aqueduct passes through a tunnel under the hill, but the path that runs alongside it climbs up a staircase whose steps are made of single blocks of sandstone, on the edges of which you can still see the marks left by the wedges used to split the stone.
At the top of the steps, you will find theGR®11(red and white markings), which you take on the left. An oak-lined path leads to the Tour du Buisson.
(3) Climbing up to the terrace via the spiral staircase, there is a beautiful view to the north, as far as the Eiffel Tower in good weather. Continuing alongthe GR® trail, you arrive at the Platière du Télégraphe, marked by an information board. This is a protected area with fragile vegetation. On the right-hand side of the path, you will walk alongside one of the many sandstone quarries in the Forêt des Avaux.
(4) When you reach the second information panel indicating the exit from the plateau, leave theGR® and take a blue-marked path on the left. This path stays on the ridge for a while, then descends into an area with sparse trees.
(5) At this point, when you reach the remains of a dry stone wall, leave the blue markings and take an unmarked path that climbs up to the right. Staying on the ridge, ignore a path on the left and make a return trip to the remains of a Chappe telegraph tower.
(6) On the way back, take the path on the right that you passed on the way there. This path joins a wider track, which you take on the right and which leads to the road to Beauvais. Follow the road south for a few dozen metres.
(7) Leave it on the left at a forest barrier (signposted "Sentier des Ducs"). To the right of the picnic tables, take a sandy path that climbs with a few steps made from half-buried tree trunks. Here you will find blue markings, which you follow to the top of the Rocher du Duc.
(8) Just before the top of the rock, you will see theGR®11markings (red and white). Leave the blue trail and follow theGR® towards Beauvais (south-west then south) until you reach the hamlet of Beauvais. Go through Rues de la Couture, Rue du Gazon and Place Adeline.
(9) At the exit of the hamlet, leave theGR® which turns right onto the Chemin de la Messe and continue straight ahead into the Vallée de Chenevière. At the exit of the valley, you will cross the aqueduct again, which can be seen to the south by a line of trees in the fields.
(10) At the end of the forest, the main path turns right. Continue straight ahead in the valley until you reach elevation 151, where you will come out onto the Beauce plateau.
(11) Turn slightly right and continue straight ahead. Cross two roads.
(12) After a left turn, take the path on the right that leads to the Malvoisine farm.
(13) At the farm, take theGR®11on the right. After crossing the D153, you will find a metal gate on the left at the corner of a wood.
(14) Leave theGR® and turn left, then after 50 m turn left again onto the path that runs alongside the woods. This path then descends, crosses the aqueduct at the edge of the woods and leads directly back to the church (S/E) via Rue Royale.
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