Departure from the "Les Claux" car park.
(S/E) Follow the forest track towards Lac de Clausis (yellow markings) until you reach the Bergerie du Bois Noir.
(1) At the sheepfold (signpost), follow the track to the right, crossing the bridge over Le Cristillan, and continue along the track to the junction in front of Cabane de la Lavine.
(2) At the Cabane (signpost), take the path that climbs to the right into the forest. The path narrows and winds its way up to the mountain pastures, crosses the stream and arrives at Lac de Clausis.
(3) Walk around part of the lake and descend via the same route to the Les Claux car park (S/E).