Start at the church in Pourchères.
(S/E) Follow the yellow-marked trail, climbing to the left towards "Le Rocher Noir" for 1.3 km. At the first fork, turn left and at the next fork, follow the trail on the right (end of the tarmac). Continue to the next fork.
(1) At the crossroads, head towards Greytus on the left (small wooden sign).
(2) When you reach Greytus and its church, continue to the right for about 200 metres. At the top of the hamlet on the right, leave the road and take the path on the left and descend through the chestnut forest. Follow the path that winds through the forest.
(3) Still in the forest, turn left towards peatland, then right towards La Pra (sign) and continue downhill. You will then see a stone bridge and a stream on your left.
(4) Do not cross the bridge, but cross the stream and follow the signs for Ajoux. You will begin the climb. Continue uphill overlooking the Auzenet stream and pass the hamlet of La Pra.
(5) Walk along the road for a few metres and take the path on the right. Pass a building and a stone shelter and you will soon see the Rocher d'Ajoux. Continue along the marked path.
(6) When you reach the hamlet of Le Cros, cross it and continue along the D361 to the entrance to Lavastret.
(7) At the entrance to the hamlet, take the path on the left towards "Greytus, Ajoux, Pourchère" for a fairly steep climb. At the top of the hill, take the path lined with fences on the left. Pass a small spring and then reach the first intersection of the route.
(1) Descend via the same path to Pourchères (S/E).