From Lempdes-sur-Allagnon (or Blesle), take the road that runs alongside the Allagnon (D909). At the hamlet of Lanau, head towards Léotoing, where you will find a car park near the chapel at the entrance to the village.
Markings: Yellow (PR®502).
(S/E) From the car park near the chapel, go down the road towards Lanau (signpostedPR®502).
(1) After about 50 metres, take the first path on the right. This passes under the castle and then turns left towards the road. Just before the road, take the small steep path that descends to the right.
(2) Back at the road, walk up it for a good hundred metres and turn off onto the first path on the right, which goes into the woods and follows the Saduit stream upstream. Continue until you reach the plateau.
(3) At the plateau, turn left
(4) At the hamlet of Serre, continue along the marked path opposite and return to the car park (S/E).
