Following the gorge, these routes traverses the torrent d’Ailefroid. The routes can be done separately if you want to stop after the blue or continue on the black.
Blue: the first section you come to after the parking, it starts by going up the left side of the road tunnel, across the top and down the other side. Then crosses a wire bridge, rock staples and some rope bridges out over the torrent, before leading back to the rock face. This continues until it heads up to the path, here turn right to head back to parking or left for the black.