From Allevard, take the Vallée du Bréda towards Fond de France. On leaving Pinsot, take the small road on the left up to Gleysin (Hameau de la Bourgeat Noire): there is a car park at the end of the road.
(S/E) Continue straight ahead on the level path for about 300 metres.
(1) At the crossroads, leave the main path (towards the Refuge de l'Oule) and descend slightly to the right, crossing the Maître and Gleysin streams, then climb up the steep slope opposite through the forest, following a few wide bends until you reach the clearing at the Chalet du Bout.
(2) Continue straight ahead on slopes that are now moderate, pass at the foot of the Sapins Henri IV and at the Bout crossroads, turn left to climb the forested ridge of the Montagne de Combe Grasse.
(3) At the fork (Les Lanches sign), leave the level lake path and climb left up a more discreet path (towards L'Oule) leaving the forest to climb to the summit of Croix du Léat.
(4) Head south-east towards the next peak on the ridge, Pierre Pin, via a mountain pasture trail with a few rocks.
(5) Retrace your steps to the edge of Croix du Léat and turn left onto the path leading down to Chalet and Lac du Léat.
(6) Go around the lake and take the level path to the north, which, with a few steep sections, leads back to Les Lanches.
(3) Return by the same route you took to Chalet du Bout.
(2) You can make a round trip to Lac Rouge by following the forest track to the north, which is level at first and then descends to the lake.
(7) Turn back to Chalet du Bout.
(2) Then descend to the left into the forest, following the same route as on the way up to the car park. (S/E)