Park in the Camp de César car park, located 1 kilometre above Laudun, at the end of Rue Frédéric Sauvage.
Yellow signposts
(S/E) From the car park, join the track and follow it to the left (north-west) to quickly reach the Lauzière crossroads. Continue straight ahead on the track (ignore the path going up to the right, which will be the way back).
Pass two houses and 10 metres after rejoining the tarmac, just before the letterboxes numbered 495-499, look for a path on the right, which is not very visible (there is no signpost indicating a turn and the route on the map is slightly off).
(1) Leave the track and follow the path on the right that climbs through the vegetation. At a fork, turn left. 10 m after (the fork is not marked on the map), turn right, going around a pine tree. Shortly afterwards, the path becomes flatter. Leave a vineyard on your left and start climbing up a stony slope. You will arrive at a plateau (with views to the left of the Chapelle Saint-Pierre de Castres and the valley) and continue through the holm oaks. At a fork (not visible on the map), turn left and continue for about 400m to the Plateau de Lacau Sud crossroads.
(2) Turn left towards Riaille le Haut. The path runs along the cliff with unsecured viewpoints (be careful!). The path moves away from the cliff and slopes to the right, arriving at a small crossroads (not visible on the map). Turn left, immediately go around a wooden barrier and arrive at an esplanade at the Riaille le Haut signpost.
Continue right on the path towards the Chapelle Saint-Pierre de Castres. You will come to a meadow (with the remains of a metal cross on your right) and turn left to go to the chapel.
(3) Go around it and retrace your steps to the Riaille le Haut signpost. Turn left onto the same path as on the way there, go through the gate and turn right to follow the cliffs again. You will come to the Plateau de Lacau Sud signpost.
(2) Turn left towards Plateau de Lacau, quickly leave a path on your left and continue on the main path until you reach the Plateau de Lacau crossroads.
Continue left towards Combe des Trois Platanes on theGR®42trail (red and white markings and yellow markings) to reach the signpost.
(4) Turn right towards Les Dessus de la Combe d'Enfer, staying on a flat path, and after about 500 m you will come to a crossroads (marked by a juniper tree). Turn left (there is no sign indicating a left turn!) and after 200 m you will come to a more open area with a beautiful view. Leave a path that descends to the right (not visible on the map) and continue straight ahead, descending for about ten metres. Return to the path you left just before and continue descending for a few metres until you find the signpost for Les Dessus de la Combe d'Enfer (slightly to the right).
(5) Turn right towards Plateau de Lacau (ignore the path that descends to the left into Combe de l'Enfer). Follow the flat path, ignore a path that descends to the left further on (the route is offset on the map) and continue. A little further on, the path veers left to descend into the hollow of a valley. Continue along the left, ignoring a vague path on the left (old route) and climb slightly to reach a crossroads.
Turn sharply left into a small valley and climb up the opposite slope immediately. Walk pleasantly along the plateau (a path is marked on the map but is no longer visible on the ground). Shortly afterwards, you will reach a viewpoint overlooking the cliffs on your left.
(6) At the next fork (not visible on the map), turn right for a short climb, then continue on flat ground through an open area that leads to the edge of the cliff. Follow the cliff to the left and, after a second viewpoint, you will reach the Plateau de Lacau Nord crossroads.
(7) Turn left towards Belvédère and after about 400m you will reach an esplanade. Take the path on the right and climb up to the belvedere and its orientation table.
(8) Return to the fork on the esplanade and turn right towards Pied du Belvédère. The path, which is stony in places, soon descends around the rocky outcrop and joins a track.
(9) Turn right onto this track. 200m further on, at the La République le Haut crossroads, continue straight ahead (ignore the path on the left and the trail on the right (not marked on the map). Continue along the track until you reach the La République signpost.
Continue straight ahead on the track towards Forage de la République (ignore the path on the right). After 200 metres, continue on the left-hand track until you reach a metal barrier.
No more signposts
Go around this barrier and continue straight ahead on the DFCIM8 track (ignore the tracks on either side). After about 200m, leave the track and take the path that climbs up to the right.
At the first fork, follow the right-hand track. At the next fork, leave the right-hand branch. Shortly afterwards, rejoin the right-hand track you left earlier and continue to a new crossroads (tree in the middle of the crossroads). Turn right and after 50m you will reach a signposted path.
Yellow markings
Turn left and after 50 m, you will reach the Dessus de Valliguières signpost.
(10) Go up to the right towards Passage du Loup. Be careful, the passage between the rocks is only 27cm wide at its narrowest point!
The climb is steep before you reach the foot of the rocks. You will need to tuck in your stomach and take off your backpack to get through the Passage du Loup! The trail finally emerges onto the nearby plateau with a scenic viewpoint. Go to the crossroads just above the viewpoint.
(11) Turn right towards Chapelle Saint-Jean de Rouziques (ruins). Then head left along the path, pass the statue of a Vestal Virgin and arrive at the edge of the cliffs offering beautiful views of the Rhône valley. The signposts follow these cliffs, passing a wooden viewpoint at the edge of the precipice, then begin a short descent to go around the old rampart and climb further up to reach the site.
Descend a few metres to reach the sign for Camp de César at the entrance to the site.
(12) Enjoy the site by visiting the various ruins explained by the information panels, then return to the entrance.
(12) Facing the sign at the entrance to the site, turn right (leaving the wide path that descends directly to the car park). Follow thePR®30signposted path and you will arrive at the statue of Sucellus (Gallic god of pastoralism). Shortly afterwards, there is a new viewpoint on the left and some ruins on the right (remains of ramparts?).
Continue along the trail, ignore a path on the right, pass some ruins (steps carved into the rock) and arrive at a fork.
Continue to the right and stay on the main trail, ignoring the other trails. You will arrive at the Col de Ventabren Est signpost. Take the descent to the left, on the wide path, towards La Lauzière, which will lead you to a track.
Turn left and follow this track to the car park (S/E).