The start is at the northern exit of Vesseaux, by the former cooperative winery, now a wine cellar. Parking is available in front of or behind the building.
(S/E) Set off eastwards, leaving the road leading to the hamlet of Le Planet on your left. Immediately afterwards, turn right and head towards a motocross track climbing very steeply up the marl slopes. Go round this climb on the left and continue to a flat area above the marl.
(1) Ignore the path opposite leading up to the Croix de Mousson and turn right, heading level on, until you reach a dirt track.
(2) Take this track to the left and climb up to the first hairpin bend.
(3) At the bend, leave the track to the right and take a path that climbs very steeply up the embankment, then turns right and climbs more gradually.
Rejoin the track and complete the climb to the Col de la Croix de l’Houme.
(4) Turn left, then turn right twice.
At the next junction, leave the white-and-yellow markings which head off to the left and continue straight on until you reach a large left-hand bend.
(5) Turn left, leaving a track on your right, then, towards the end of the track, take a path on the right which descends towards the Ruisseau de Chante-Perdrix.
Cross the stream (which is always dry) and head back up the other side. Turn right onto a well-maintained path.
Pass a path leading uphill to the left and continue along the ledge path for about 1.5 km until you reach a white-and-yellow signposted path.
(6) Take this path to the right and head down towards the bottom of the ravine. Cross over and head back up the other side.
At the first hairpin bend to the right, ignore a path on the left.
(7) Just after the second hairpin bend to the right, leave the marked trail and take a horizontal path to the left, heading back up. Please note: throughout this section and beyond, the IGN map is not very accurate; consult OpenStreetMap instead.
(8) At the first junction, take the path on the left. After rounding a rocky spur, this path leads to the bottom of the ravine at the confluence of the Ruisseau de Louyre, which flows in from opposite, and the Ruisseau de l’Eyrolle on the right.
(9) Walk upstream along the Ruisseau de l’Eyrolle for about twenty metres to see the resurgence of the Évent des Grenouillettes in its rocky cirque. Then retrace your steps back to the confluence.
Go round a large tree right at the confluence and head northwards along a barely visible path overlooking the upper reaches of the Ruisseau de Louyre on the right bank. Do not be led astray by what appear to be paths to the right or left. The path marked on the IGN map no longer exists; use OpenStreetMap instead. Climb up to a small grassy clearing above a dry-stone wall, where you will find a well-marked path.
(10) Turn left onto this path, which widens into a farm track after the first small valley.
(11) After a second small valley, take a path climbing up to the right. Pass a track on your left and continue to the next junction.
(12) Turn right onto a path marked in white and yellow, ignore a path on the left and continue to a three-way junction.
(13) Leave the marked path that climbs to the left and go round the hill to the right. Join the marked path on the ridge again a little further on.
At the entrance to the second small copse, do not take the track marked on the IGN map to the left, as it is a shortcut that is too steep and very unpleasant. Continue along the ridge to a four-way junction.
(14) Turn left back towards the ‘La Chéoune’ signpost and continue through the state-owned forest.
(15) After leaving the woodland, at a hairpin bend, leave the marked trail and continue straight on along a path following the ridge. Descend between two rows of faysses until you reach a track.
Turn right and head towards a large crossroads.
Turn left, pass between two vineyards and then past the recycling centre to reach the car park (S/E).
