Start from the car park at the pass on the D67 between Lambesc and Charleval at a place called La Cabane du Fou.
(S/E) Follow the path to the north-west, which quickly turns into a trail marked by three red dots, which runs along the ridges.
(1) Once you reach Mont Trésor, continue westwards along the path, now marked with red lines.
(2) After descending into a small valley, then climbing back up towards the north-west, join another trail marked in yellow.
Turn left towards the west for 70 metres.
(3) Head north, following the red or yellow markings.
Before descending into a valley, leave the marked trail via a path on the left that takes you to the Crêtes du Cuou de Peyrou (cul de chaudron in Provençal).
At the end, a metal balustrade leads you to the right to a staircase that descends into a hole to access a very dilapidated footbridge, which is not recommended, that runs along the cliff. It appears to be an old access point to a mine.
(4) Enjoy the view and turn back.
(3) Find the red or yellow markings. About a hundred metres before this point, you can take a path on the left at a small cairn that descends to the bottom of the valley to rejoin the marked trail. Turn left to climb back up to the ridge and follow it eastwards.
(5) Just before reaching the DFCI track (elevation 282), take the unmarked path on the right, which runs alongside the track below.
(6) After rejoining the DFCI track not far from a cistern (elevation 311), follow the path opposite, heading north-east, until you reach the D67.
(7) Cross the D67 and take a path to the right that overlooks the road for about 200 metres. Then turn left onto the path and quickly leave it to take a path on the left, marked in red, which descends into the valley.
(8) After joining a path, turn right at a metal hunting post onto a trail that climbs for 120 m before turning north.
This path joins the track at a cistern and continues, cutting across the bends in the track to descend to the Canal de Marseille.
(9) Follow the Canal de Marseille to the right, on the left bank. You will arrive at the Valbonnette Aqueduct, which unfortunately cannot be crossed. This means you have to descend into the valley to the entrance of the Domaine de Valbonnette, then climb back up the other side. Continue to follow the canal, which will pass through a tunnel. A path climbs up the side to join a track.
(10) At the crossroads, turn right for 30 metres, then left to reach the Vallon de Vabre de Jacourelle above the Jacourelle Aqueduct.
(11) Follow the path that climbs to the right, following the valley for about 1.1 km.
(12) Turn onto the path on the right, which is circular and leads back towards the hamlet of La Jacourelle. 100 m before the hamlet, take the path on the right which leads to a crossroads, where a sign points to the right towards the Chapelle Sainte-Anne de Goiron, 1 hour and 10 minutes away.
(13) At the top of the hill, turn left to pass the entrance pillars of a private property. Quickly leave the path on the left to follow the yellow-marked trail that winds through the woods until it joins a path that continues to climb.
(14) Leave the path and take an unmarked steep path that climbs to the right to the chapel. Climb above the chapel via a concrete path to reach the monument* commemorating the resistance fighters killed by the Nazis.
(15) Descend the access road to pass by some old cave dwellings, cut across two bends and then continue along the road until you reach a path marked CC103.
(16) Take this path on the right, then quickly turn left onto another path that descends into a small valley before climbing up the other side to a cistern.
(17) Leave the path and take the trail that descends into the valley towards a field. Then turn right onto the trail that climbs to the top of a cliff. A rather steep and rocky trail descends on the other side.
Once at the bottom, take the path on the right that climbs back up the valley to a pass.
(18) At the pass, head left, ignoring a path immediately to the left. The path climbs towards the cliff with a small rocky passage before arriving at the Plaine de Sèze. Then follow the path that runs along the cliff to the west for about 350 metres, before heading north to return to the starting point (S/E).