Start from the Parcours Aventure car park, accessible from the D8a hairpin bend via the forest track.
(S/E) Follow the forest track south-west.
(1) At the junction, continue left along the forest track until the next fork.
(2) Take the path on the right. It crosses the Ruisseau de l'Aupet, then climbs steeply and becomes a footpath.
(3) From this point, you will find very old yellow and green trail markings. You gradually leave the cool, wooded area to reach the Pas de la Selle.
(4) Continue along the path. After about 800 m, leave the path and head right to reach the first hut.
(5) First hut, a shepherd’s hut. If the water supply is low or the streams are dry, extend the detour by 500 m by heading north-north-west to the Fontaine des Bachassons. Otherwise, return to the path you have just left and continue straight ahead on the narrow path, whose faint markings wind considerably. Follow the small cairns.
(7) Second shepherd’s hut. Continue through the green valley towards the south-west.
(8) As you come out of the bend to the left, look out for the barely visible roof of the Jasse de Peyre Rouge and descend to the sheepfold, following the cairns down the stony slope.
(9) Take the south-facing path, marked by cairns, which often contains rusted shell fragments.
(10) At the cairns, leave the well-marked path leading to the Chaumailloux hut on your left. Follow the south-south-west valley straight ahead, skirting Tourte-Barreaux as closely as possible. The path is fairly poorly marked, so follow the cairns.
(11) When you reach the ruins of the enclosure, continue straight on to the Jas Neuf sheepfold.
(12) A large sheepfold with a red roof that can be spotted from a great distance from the heights. After 200m to the south, join the path leading to the junction with theGR®91andGR®93. Turn right.
(13) The junction is poorly marked: no boundary stone or sign, just a small dry pond and a metal post. Follow the red and white markings, turning right.
(14) Optional: at the right-hand bend, leave theGR®s and take the path on the left which leads, after 700 m, to the Cabane and the Fontaine des Bachassons. Low flow: 1 litre of clear water in 3 minutes in early June 2015. Retrace your steps.
(13) Follow the red and whiteGR® markings northwards.
(15) Pass through the Col du Pison (1,655 m) and continue.
(16) At the fork, leave the path leading to the Fontaine de l'Ours on your left, turn right and continue to a junction.
(18) Turn left and head for the Cabane de Peyret.
(19) Continue to the Fontaine des Endettés, 100m further on, to the south-southeast. Fairly low flow: 1 litre of clear water in 2 minutes in early June 2015.
(20) Retrace your steps.
(18) Turn left onto the path offthe GR® which climbs towards the Plaine de la Queyrie. Follow this path which joins theGR®, then branch off amongst the boulders on the slope on the left-hand side of the valley as you climb (some cut straight, others in columns) to reach the Carrière Romaine.
(21) Continue up the obvious path towards the north-east and rejoin theGR® which leads to the Fontaine des Bachassons. A fountain with a good flow: 3 litres of clear water per minute in early June 2015.
(22) From the Pas des Bachassons, the path descends steeply into the bed of the Ravin des Serres and the Ravin du Maupas, then through scree and finally into the undergrowth.
(22) Cross the contour path coming from the left and continue to the right on the path that descends, first in switchbacks and then straight ahead. Continue to the junction from the outward journey.
(1) Continue straight on to reach the car park (S/E).