Description of the route

From the end of the paved road in Stafal, in the municipality of Gressoney-La-Trinité, go up the valley on the orographic left bank, along the trail signposted 7.
When you get to the lower edge of the left moraine of the Lys glacier, ignore the path for Col Salza and continue along a small valley closed between the left lateral moraine and the valley of Salza.
Further along, the path crosses left onto the moraine ridge.
Go up the moraine ridge until you come to a steeper section. Cross this, again towards the left, along traces of the path, until you come to the springs of the Lys.
The stream waters emerge directly from the glacier to form a small lake.