Park in the Col des Portes car park.
(S/E) From the car park, a trail climbs directly uphill. It disappears a little on the slope, but just keep climbing. You will reach a beautiful trail.
(1) Take it to the left and join the path that climbs up from Col des Portes.
See alternative route in Practical Information.
(2) Continue to the right, following the cliffs of the Citadelle (yellow markings). Follow the marked trail until you reach a wide track.
(3). Take this track to the left and ignore the nearby observatory, which will be on the way back. Continue along this wide track marked in yellow until you come to a new track and theGR® markings, elevation 599.
(4). Follow theGR® trail to the right until you reach the farm on the Lambruisse departmental estate. Don't hesitate to visit the small hamlet and its chapel. There is also a shelter that is ideal for picnics.
(5) Continue on theGR® trail, staying on the track that passes the farm and climbs to the right. Pay attention so you don't miss the fork to the right. Pass a well and, further on after a left turn, look for a path leading off to the right.
(6) Take this shortcut, which avoids a long bend in the track. Return to the track you left earlier.
(7) Continue on theGR® trail to the right until you reach the Sinne site and its small observatory. Continue on the GR® trail.
(8) At this junction, leave theGR® trail to the left and continue along the track. You will come out onto the road.
(9) Turn right to return to the car park, a few dozen metres away (S/E).