Park at the top of Chemin du Sanatorium, about 50 metres after the end of the road, on the stony area in front of the old batteries. By bus, take line 10 to the terminus: Tilleroyes. Yellow and blue markings.
(S/E) Take a look at the ruins of the batteries, without going inside (entry is prohibited). Turn right (facing the rehabilitation centre) into the dead-end road.
(1) Please note: At the large metal gate, continue along the small tarmac road for about twenty steps and take the path on the left (towards Tilleroyes). Do not take the forest path immediately to the left of the gate. They meet further on, but it is not very attractive. Walk through a pretty little corner of the forest, full of sinkholes, and you will soon come to a path running perpendicular to it, which you should take to the right.
(2) When you see a clearing, stay in the Menère Forest by turning right onto the gravel path. It soon forks. Keep going left. Twenty steps further on, at the fork in the path, keep left (towards Tilleroyes), walking along the edge of the woods and an old pile of stone gathered from fields.
(3) At a bench where you can take a short break, you will come to a wider, gravel path which you take to the right. Leave the woods for a few moments, and quickly, before the path becomes tarmac, re-enter the woods via a path on the right. At forest signs no. 20 and 21, you will come to another path; turn left. Leave this path after 200 metres and turn right at forest signs no. 12 and 13.
(4) Cross the small tarmac forest road of La Menère at a new bench and information sign. Continue along the path on the other side. You will soon come to a track; continue straight ahead along this wide dirt track.
(5) After walking for a while, you will come to a fork marked by a signpost. Take the left fork (towards Tilleroyes). You will soon come to a stone path running perpendicular to the main path. Take this path on the left. Leave the woods and you will come to a house. Continue straight ahead along the stone path.
(6) You will arrive at the car park for the Tilleroyes departmental forest (which can also be the starting point for the walk) and immediately descend to the right along the small tarmac road that takes you back to the sanatorium and the car park (S/E).