Start: Parking at the junction of the departmental road of the old road giving entrance at the Grand Maison flood barrier.
Descriptive: Take on the left the wide hairpin bend path going down to a bridge. Once crossed, go to the left at the junction and go up at the Montfroid pasture to the pass, then go on the left on the ridge to reach the Nicolas lake. Possibility to reach the Etendard refuge.
(Warning itinerary in blue dotted lines to Nicolas lake then in red dotted lines to the refuge.