Departure from Saint-Yon Church, located on a hill at the end of a small road off the D19. Parking at the foot of the church.
Red and white markings
(S/E) Take a good path heading south, leaving the old Porte des Bourdeaux and an information sign on your right. Ignore a path on the left and continue straight ahead (east) along the wall of a property. Go through a forest gate, down a sunken path and under a small private bridge. Ignore another path on the left (elevation 129), go through a forest gate and continue along the edge of a fenced garden.
(1) At the crossroads, continue straight ahead and immediately turn right (south) onto Chemin de la Procession. At the next intersection, go straight ahead, pass a forest gate and enter the woods. Wind your way along a good path, first through a deciduous forest and then through a pine forest.
(2) At the crossroads, turn left (due east) and follow theGR®655slightly downhill. Pass through a forest gate and come out onto a wide path, which you follow to the left.
Without signposts
(3) At the first houses, turn right onto Chemin de la Forêt (let theGR® turn left). At the next fork, keep right again (forest gate, dead end).
Yellow signposts
(4) At the end of the path, turn right at an acute angle and follow the cemetery wall on your left. Walk along horse pastures and then re-enter the woods. Ignore two paths on the right and follow a fence on your right.
Red and white markings
(5) At the fork, turn right and walk along a low white house on your right (no. 36). Further on, walk along a fenced garden on your left. In the woods, the slope becomes steeper and the path becomes narrower, dominated by a few sandstone blocks on either side. At the top, turn right and continue on flat ground for about 100 metres. Then take thefirst path on the left (elevation 147).
(6) At the next junction (not clearly marked), go straight ahead. Further on, start descending along a sunken path (the tall silhouette of Saint-Sulpice Church can be seen through the branches). Leave the woods, with the church clearly visible, and continue downhill between the fields and then along a narrow lane. At the stop sign, turn right onto the main street (Rue du Four à Chaux on the map). At the side of the church, leave the signposts for a moment and turn left to reach the front of the church.
(7) Facing the church, turn left and then right twice to complete the loop. Back at the side of the church, turn left onto Rue Alphonse Lavallée and follow theGR® 1 and 655 signs. At the crossroads (large white gate opposite), turn left.
(8) After a few dozen metres, before a forest barrier, turn right. Climb up the embankment on the right, then between the sandstone blocks. The numerous "Private Property" signs along the path are a better guide than theGR® markers themselves! At the top, turn left, then immediately right. Begin the descent.
(9) At the fork, follow the Chemin de la Sablonnière to the left. Continue downhill, keeping north-west and ignoring all the paths branching off to the sides. At a T-junction, turn right onto the Chemin de la Ferté.
(2) At the crossroads you took on the way there, turn left and follow theGR®1. Leave the woods, continue straight ahead and then turn left.
(1) Follow Chemin de la Folie westwards. Continue straight ahead, pass a forest gate, climb uphill, pass under the small private bridge again and then a forest gate. Continue on the main path to return to the church of Saint-Yon (S/E).