Start from La Cartara, south-west of the village of Burdignes. Park near a cross on the right as you head uphill.
(S) Set off along the gently descending path to the west, on the other side of the road. Follow this well-marked path, which then crosses a stream and curves to the right. Ignore two paths leading uphill to the left and continue straight on until you reach a tarmac section, which you then follow all the way to the left as it climbs.
Pass below a house situated higher up on the left and enter the forest. Follow a flat, straight section, pass a spring on the left and look out for a large paved area of large stone blocks on the left: this is where the path through the forest begins.
(1) Turn left and climb the path used for timber harvesting. It curves to the right then to the left before veering off to the right again and climbing in a straight line to the Burnisson forest track (ignore the cross-country paths).
Once on the track, follow it to the right for 1,250 metres, ignoring two paths on the left in succession: one towards the 1,196m mark, the other shortly after. Pass close to a forest hut on the left and arrive at a junction of two tracks at the 1,189m mark.
(2) Follow the track that heads left, climbing slightly, curves left, then reaches a small valley and turns right at the 1240m mark. The path is flat then descends slightly to reach a junction at the 1242m mark, the site of a timber yard.
(3) Leave the track heading almost straight ahead and take a path climbing steeply to the left, heading due south. Ignore the paths branching off to the left and right and cross a grassy area planted with conifers. This path leads to a main track, which you follow to the left for 1 km.
(4) Leave the track and follow a path branching off at right angles to the right, heading slightly downhill. This path starts almost in a straight line before making a sharp bend to the right. Ignore the cross-country paths and, in the valley at the 1205m mark, leave the path straight ahead to take the one descending to the left in a tight bend.
Arrive at the hamlet of Achis and follow the tarmac section climbing to the left and passing in front of a house’s courtyard.
(5) Take the grassy path behind the houses below on the right. Follow this path uphill to reach the meadow with the Cros du Vernet house on your left.
(6) At the junction, turn left, ignoring the path going straight ahead, and follow the edge of the meadow. At the 1237m mark, opposite the entrance to the house, follow the path to the right then take a hairpin bend to reach the tarmac road. Pass through the hamlet of Blache Pécou and arrive at the crossroads at the Maison dans la Nature.
(7) Follow the partly tarmac-surfaced path to the left for about 150 metres, then take a descending path on the right that crosses meadows. You will reach a forest track at an elevation of 1178 metres; follow it to the right until you exit the forest.
Then take the path on the left marked in white and brown. This path crosses the forest, curves to the left then right, skirting an area of springs on the right, and leads back to the starting point.