Park near the Mining Museum.
(S/E) The path starts directly opposite the footbridge leading to the Museum. It passes under a pinkish-coloured building (a former school and museum), then goes to the left of a chapel, climbing a grassy slope to a track.
(1) Follow the track to the right to reach the road. Walk up the road for 100m.
(2) At the bend, head straight ahead onto a track and follow it for 180m; when you reach a hairpin bend, turn left. 150m after the hairpin bend, leave the track and take a path.
(3) Head up through the woods. This path starts at an altitude of 940m. It will soon cross a track (not shown on the IGN map) which you should ignore as you continue the steep climb.
The path will eventually lead out onto a wide track; follow this for 30m to the left and then take the level track to the right.
(4) You will soon reach a covered picnic table, followed by the entrance to the Sainte Barbe Mine; a visit to this mine takes 1½ hours, and tickets are on sale at the museum; needless to say, the access path acts as a natural filter for potential visitors.
After the mine, continue along the track, which soon becomes a path; this begins a new climb before leading onto a wide track.
(5) Then turn left onto the track. Follow this track for a kilometre to reach the small building of the Batterie de Rochebrune.
This building has been restored and now serves as a refuge; the esplanade in front offers unobstructed views.
For the rest of the route, the path descends through the forest; take great care not to stray from the path, although the markings are quite frequent (every 10 to 15 metres), and remain vigilant as the descent is sometimes steep.
(6) At the Col du Petit Cucheron, join a wider track; take it to the left. On the descent, take the shortcut via the Place du Petit Cucheron.
After this, the track takes you gently back to the starting point (S/E).