Coming from Vieux Dun, just after the Pont du Vieux Dun, turn left and park 300 metres further on along the picnic area, which has tables, including a large one under a shelter.
(S/E) Follow the tarmac Dun Forest Road uphill. When you reach the junction with the Fongis Forest Road, continue left for about a hundred metres until you reach the clearly signposted junction with the Chemin Paris.
(1) Turn left onto this path to head back down into the forest. Follow a few wide hairpin bends to reach the River Cure.
(2) Turn left to follow the right bank, reaching the confluence with the Ruisseau de Saint-Marc. Stay on the right bank of the Cure throughout. You’ll reach the climbing site; at this point, a section involving walking over rocks is a little tricky.
(3) Carry on to return to the car park at the picnic area (S/E).