To find the small car park at the start, follow the D87 from the Vère Grésigne Leisure Centre towards the Grande Baraque Forest House. In front of the forest house, turn right onto the dirt track, the Route Forestière du Rô Oriental. Continue for one kilometre to reach the clearing and its car park.
Yellow markings
(S/E) Facing the car park, head to the right. Follow the wide track called Route Forestière du Rô Oriental. Walk towards the first junction.
(1) Turn left onto the Route Forestière de la Baronne. Pass, not far on, a petroglyph or engraved rock. Skirt round Lac Rond. The track joins the Route Au Cœur de la Grésigne.
(2) At this four-way junction, leave the Route Forestière de la Baronne. Turn left onto the Chemin de Mailhac. The track heads west and then, after a large circular bend, turns south. At the end of the track, cross the Rô Oriental. Reach an inverted Y-junction.
(3) Turn sharply onto the Route Forestière de l'Ourtigas. Follow the north-westerly direction to the next inverted Y-junction.
(4) Turn sharply left. Follow the yellow markings which pass through the Oppidum Saint-Clément. Climb a few steps on the left to reach the oppidum, recognisable by its mound and protective ditch. Continue to the T-junction with the Route Forestière de l'Infernou.
(5) Turn left and cross the stream of the same name. Follow the stream to the Route Forestière du Rô Oriental. Turn left to return to the car park (S/E).
, it's still there. You can clearly see the large ditch and the big wall. But don't expect to see any Romans or even any signs. It's a place overgrown with vegetation, but your imagination will do the rest...