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(S/E) From the Feuillardière car park, join the D409 road and follow it to the left (towards Milly) for about 150m. Then find a path on the right that enters the forest and runs alongside the D409. Cross the wide Chemin de la Passée aux Moutons and continue westwards. Pass close to the Maison Forestière de la Vendée, continue straight ahead and join the edge of the road.
(1) Turn right (west-northwest) onto the wide Aqueduc de la Vanne path. The path, which is very wide at the start, then narrows. It runs alongside one of the Coquibus ridges (beautiful rocks on the right). Cross the Route des Cent Marches. Then leave a path on the left. The path widens again and winds along a sort of bench between the ridge and the valley. It turns south to leave La Vanne and descends towards the departmental road (in this bend, ignore the path that branches off slightly to the right)
(2) Before the departmental road, take the path on the right (Chemin de Rumont) and walk alongside the old Coquibus hotel on the left. After the hotel, at an intersection, continue straight ahead.
(3) At the crossroads, turn right onto Chemin de la Boulignière. After the damp atmosphere of the previous path, this path takes you back into the Bleausarde atmosphere (sand, birch trees, heather). Ignore a path on the left and join Chemin du Nid d'Aigle.
(4) Turn right onto Chemin du Nid d'Aigle, which climbs up to the plateau. At the top, take the path immediately to the right. It leads to an isolated house. A few metres before the house, at the two markers indicating the entrance to the property, turn left and then left again to reach Chemin des Cent Marches.
(5) Turn right and go down the steps. Continue along the flat path and ignore the paths to the right or left until you come to a barrier marking a protected area that is susceptible to erosion.
(6) At this barrier, take the path on the left. Wind your way up a small valley that will lead you to the top of Rocher des Voleurs. You will come to a crossroads (Carrefour des 4 Héros), continue climbing on the left, and reach a viewpoint (100 metres further on).
(7) The path continues to the right of the viewpoint (north) and briefly enters a spectacular plateau.
(8) After the barrier (identical to the previous one), take the path that descends to the left (west).
(9) Almost at the bottom of the descent, take a path that branches off to the right (Chemin du Parc aux Bœufs) and climbs back up onto the plateau (shortly before the end of the climb, there is a beautiful viewpoint on the right). At the top of the climb, continue along the path, which widens. A little further on, the sign indicating the name of the path might suggest that you should continue along the path opposite (not shown on the map). This is not the case: the path (which is wide at this point) continues to the right and joins the wide Coquibus path at elevation 126. Follow this path to the left (west), ignoring all perpendicular paths, until you reach the Coquibus farm.
(10) At the crossroads, continue west for about 100 metres, then turn left (south-west) onto the GR®. Pass at the foot of a watchtower and head west (Chemin des Grands Longs Vaux). Along the way, there is another viewpoint on the left.
(11) At the barrier, turn right onto Chemin de Milly. After about 400 metres (after the car park and another barrier), take the path on the left. At the next fork, take the path on the right and enter a small wild gorge. Climb up a fairly narrow plateau. Then follow a trail that heads east between the heather and pools of water. It heads more or less to the left of a copse that you can see in front of you. You will then come to theGR®11, which climbs up from the valley.
(12) Follow theGR® on the left (north) through the vegetation on the plateau (here, the markings may be on the ground). TheGR® winds its way down from the plateau.
(13) At the bottom, turn right (east) onto the gravel path (Chemin de Courances) and climb back up. Go around the Mare de Coquibus pond on the right to reach the farm again (but on the other side).
(14) At the crossroads directly opposite the farm, take theGR®11on the left (it will gradually take you back to the starting point). Straight ahead, it crosses a deciduous forest, turns right then left and descends from the plateau (new steps). You will arrive at the aqueduct arches, which are clearly visible.
(15) Then turn right onto Chemin de la Roche qui Tourne. Follow theGR® East-South-East, ignoring a few side paths. At the junction with Chemin des Côtes de Courances, first turn right then left and continue on Chemin de la Roche qui Tourne.
(16) At the Carrefour du Montrouget, turn right onto Chemin de Coquibus.
(17) On the climb, theGR® turns left and quickly ascends to the plateau. It then follows a ridge with a rugged end. Part of this area burned down five or six years ago (so the views are fairly clear), but dense broom has invaded the path in places. Where the vegetation thins out, stay on the ridge (heading east), ignoring an obvious path that descends to the south. Make your way through the broom among the rocks. Follow the markings carefully, as in some places they are on the ground and partly hidden by vegetation. After a final "summit", theGR® descends and reaches the wide Chemin de la Passée aux Moutons. Turn right onto the wide path and continue downhill gently.
(18) Leave theGR® when it turns left onto Chemin de Milly à Arbonne and continue straight ahead. At the next crossroads, turn left onto Chemin de l'Auvergne. Leave a path that comes in from the left and turn right.
(19) At the crossroads, turn right onto Chemin de la Mare de l'Auvergne. The path continues along a track (partially marked on the map) which climbs up a hill (leaving the summit slightly to your left) and descends on the other side towards your starting point. Turn left, then left again along the D409 to return to the car park (S/E).
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