Park on the small open area with a tree in the middle, beside the RD974 which climbs to the summit of Mont Ventoux.
(S/E) Take the wide, stony path which climbs for about 500 m to a large open area with several path junctions.
(1) Turn right onto the path marked in yellow, which climbs to the signpost for Jas de Serre.
(2) Turn left towards Reillas onto a single-track path marked in yellow and red, which descends slightly to the ruins of the Jas de Serre.
(3) Retrace your steps for about fifty metres, then follow the path to the right which passes beneath the Jas de Serre to a junction with a wider track. Take this track to the left, then leave it immediately to the right to continue along a narrower path.
(4) At the crossroads, carry on straight ahead until you reach a Y-junction, then turn left onto a wide track.
(5) Turn left onto this track, which climbs gently for 100 metres. At the junction, ignore the track leading uphill to the left and continue to the right on an almost level path. Carry on straight ahead to the car park (S/E).