From the parking area for "L'Arche de Camp Rouch", take the 4wd road southeast at the GR 71 sign "Puech Doussieu". Follow the red and white marks of the long distance footpath for 200 meters. Then turn right south and walk up hill 500 meters the path to a grove with a Christian cross (entrance of the private hamlet of Puech Doussieu -Please do not enters). Bypass the grove on the left and leave GR71 marks. Cross the meadow southwest to the middle hill and walk cross country toward the rim of the chaotic cliffs. Find there a faint path which goes along the rim. Walk the faint path 500 meters or so to a promontory. From there, the arch can be seen 50 meters down the slope. Find your way to the arch. The access is relatevely easy.