The first part of the route is common with the route to Lancebranlette, till to the fork at 2450 m: instead of going straight, turn left. The path leads in a short time to the shore of the Lac Sans Fond, pratically at the same altitude of the fork.
It is dominated from the overhanging Lancebranlette, Bec des Rousses, Mont Fourclaz and the Pointe du Lac sans Fond, too.
It is advisable to go round the lake looking for the best views; towards South the sight arrives at the far French mountain groups.
Since the zone of Petit Saint Bernard is often windy, in such days le Lac sans Fond could be an alternative destination, because of the protective action of the near mountain chains.