The treasure hunt begins in Siviez, starting from the Tortin chairlift. To reach Cleuson dam, first take the path leading along the bottom of the ski slope. Your route will then continue along Squirrels' Trail. When you come to the first big bend, take the path to your left, cross over the bridge and continue your ascent along the path through the forest. Once you've arrived underneath Tortin reservoir, continue walking along the alpine route until you reach a place called “Ouché”. Here, take the path to your left to reach Cleuson. Once at the foot of the dam, head up the path passing to the right of the wall. Then cross over the wall, admiring the magnificent views and taking in the 20 million cubic metres of water originating from the bottom of the valley. Take the tarmacked road back to the foot of the dam and rejoin the same path you arrived along, to your left. Then retrace your steps to head back to Siviez.