Leaving the car park at Merlet animal park follow directions to the Refuge Bellachat taking in the views of the Mont Blanc Massif. A few metres past the Refuge you will see a cairn with a "Aiguilles Rouges Nature Reserve" sign, here you turn left and head in the direction of the Aiguillette des Houches, the obvious high point. From here you get a 360 degree view of the Mont Blanc massif, the Aiguille Rouge and the Fiz.
Leaving the summit in the direction of Les Houches you will first come to some Rhodos in Pierre Blanche 1,679m. At this intersection turn left towards Le Plan de la Cry. Shortly before the Chalets de Plan le Cry go up the wide path to your left, rising just under 100m in elevation you will take the path that leads off to to your right (1,782m) and head back down to the car park at Merlet.