Start from the Jansac car park.
(S/E) Follow the road towards Recoubeau for 50 metres and turn right onto the Chemin des Oches.
(1) Once you reach the junction of the circular path after a short 350-metre climb, continue along the path to the left and enjoy the view over the Drôme valley and the village of Jansac through the lavender fields. Walk for about 1 km.
(2) Leave the Chemin des Oches by taking the path uphill through the pine trees on the right.
(3) At the top of the climb, after 700 m, take the path to the left.
(4) The Serre viewpoint overlooking Luc-en-Diois. Continue along the pleasant path through a forest of oak and beech trees. Cross a dry stream, following the Blue Circles. You’ll reach a clearing with a view of Montlaur.
(5) Continue along the path, which descends slightly for 500 m, then take the path on the right.
(6) Take care not to miss the path leading uphill to the right (marked with Blue Circles and a small cairn). The path climbs steadily but steadily through a pine forest and then a hornbeam forest, covering an elevation gain of 350 m. You’ll reach a junction not far from the ridge.
(7) Turn left to reach the Pas de la Pousterle.
(8) Magnificent panoramic views over the Drôme valley, the Glandasse mountain opposite and, beyond that, the Jocou, the snow-capped Trièves mountains, and then the Dévoluy massif.
Follow the path for one kilometre along the ridge towards the south-east to see the hanging rock, or Piton de l’Ours, followed by picnic spots offering bird’s-eye views of Luc-en-Diois and its rockfall.
(9) Return to the Pas de la Pousterle.
(8) Reach the junction with the path you took on the way up and take the circular path to the left, which descends gently through a beautiful beech forest.
(10) At the western end of the path, continue downwards by turning right and join the Chemin des Oches.
(1) Carry on straight ahead and retrace your steps to return to the Jansac car park (S/E).