Easy parking in the car park on the left after the last buildings on the Route du Lac.
(S/E) Walk up the road for a good hundred metres and take the path that descends briefly to the right into the Ravin de la Vallée Obscure. Continue to a fork.
(1) Turn right, between two cairns beneath the broom, just before the stream bed crosses the path. Go round the rock on your right and climb up a steep, clear but little-used path.
(2) Climb over the rocks leading to the Vallon des Fragons and follow it up to the left. At the end of the valley, follow the path up to the left.
(3) When you reach the small pass, take the path on the left which passes above the ruins. Watch out for mountain bikes: they’ve made the track. Turn left onto the next path. After the steep climb, keep to the left. Enjoy the view as you pass the cross.
(4) At the end of the descent, turn left just before the track and head down the Vallon Sourn.
(1) Continue straight on to return to the car park (start/finish).