(S/E) Start from the old priory car park. Drive along the priory grounds, take the left-hand bend and continue straight ahead (Voie Communale des Carrières) until you reach the T-junction (red gate in front of you).
(1) At the T-junction, turn right and continue straight on past Mas de la Grosse Galine and Mas Séraillet. At this point, the path is blocked by a cable. Continue straight ahead along the dented path and then a more manageable path along the Gaudre de Valrugue to the tarmac road.
(2) Take the tarmac road to the right for about 150m, then turn right at the hairpin bend, signposted "Rocher des Deux Trous" (yellow sign at this point). Continue straight on until you reach the Rocher des Deux Trous.
(3) On leaving the Rocher des Deux Trous, retrace your steps for 50m, ignoring the left-hand path you came by and taking the right-hand one. At the end of this fairly steep climb, you will be rewarded with a magnificent panoramic view over the road.
(4) Go a few metres to the right on the road, leaving the Sentier de Découverte (Discovery Trail) which dips to the right, and continue as far as the bend in the road.
Take the right-hand path back down and continue straight ahead through the heath towards Mont Gaussier.
(5) Take the metal ladder and continue climbing. Follow the blue and yellow markings to reach the D5.
(6) Carefully cross the D5 and take the path that runs alongside it on the right (blocked by a cable). Continue straight on to Lac des Peirou, leaving the paths on your left.
(7) Walk along the right-hand side of the lake to the end, then take the path cut into the rock that rises to the right. You will then come to a passageway with a succession of staircases cut into the rock, secured by chains, and metal bars set into the rock.
(8) After passing through a hole in the rock, take the path down to join the D5. Walk along the side of the road until you reach the first pedestrian crossing. Cross the road, then the park in front of you to reach the road and the car park on the left(S/E).