Park in the car park below the church in Colombières-sur-Orb.
(S/E) From the car park, walk up the street for 50 metres and take the track on the right. This leads to the Colombières Gorges, which you must climb up to the intersection indicated by signs (altitude 529 metres on the map).
(1) Leave thePR® trail that goes up the gorge and turn left towards Le Bastion (blue markings) via a path that climbs the slope head-on. Pass under Le Bastion to reach the Col de la Baume de Roucayrol.
(2) From the pass, follow the "Vire de Roque Rouge" markings. This is an exposed but not difficult section. In 30-40 minutes, you will reach the Baraques de Caylus.
(3) Continue climbing, cross the stream and after about 600m turn left towards Col de Bartouyre (signposted as 2½ hours from Les Baraques).
(4) From the fork, take the path that descends 50 metres before climbing back up to the pass between La Failladouille and Le Portail des Cades. Cross a few more valleys and small passes to reach Col de Bartouyre.
(5) At the pass, descend into the Gorges d'Héric via the Sentier des Gardes trail.
(6) Towards the bottom of the path, take the fork on the left that leads to the hamlet of La Coste.
(7) From La Coste, head to Colombières via Saint-Martin-de-l'Arçon and La Pomarède. Then climb back up via La Barrière to reach Colombières and the car park below the church (S/E).