Start from the Aven Marzal car park (check opening times) located a few kilometres from Remèze on the D201.
(S/E) Follow the path, keeping to the right at the entrance to the Marzal site, along the fence until you reach the old Marzal 2 building site. Stay on this wide path alongside the fence until you reach the junction withthe GR®4F.
(1) Turn right onto it, following the red and white markings. Turn immediately left onto the wide, straight track. You’ll reach a junction with a road.
(2) Cross it, continue straight ahead along another straight path, and rejoin a wide track at the junction with the Aven du Cadet. Turn left onto this wide path, marked with yellow and white signs, and head towards the forester’s cottage.
(3) Turn right, staying on the path marked in yellow and white. You’ll soon reach the D 290 road.
(4) Pass under the tourist road through the tunnel. Continue along the concrete road, which is closed to traffic. Begin the steep descent towards the Ardèche to reach the Gournier campsite. Then head to the Ardèche for a refreshing swim.
(5) Follow the route back in the opposite direction to return to the Marzal car park (S/E).