Approach notes

From parking Mugel, walk down to the beach and across the head of the little bay and into the Parc du Mugel (free entry, check opening times on destinationlaciotat.com). Climb up through the park and up the rounded ridge to the base of the 'ipluvium' - a low wall on the shape of a large chevron on the rock face used to direct rainwater.
Turn left and follow the edge of a wooded area, until a red dash indicates where to enter the wood and descend a small gorge with a steep wall on the left. Leaving the trees, continue increasingly steeply down the little gorge. Just when it becomes uncomfortable, a bolt appears on the left. Follow the line of 4 or 5 bolts on a rightwards traverse to reach an abseil point at the side of a deep gully. A shortish but awkward abseil leads to the base of the gully, then follow another line of 4-5 bolts to the right about past a small cave to reach a tree. On the right wall is the belay for L'Atelier Bleu, to the left behind the tree is the start of Piste Noire.