We climbed to a crossroads north of the Serre Chevalier Summit then took the trail along its western flank to Col de Serre Chevalier (2383 m). At the col which was bordering the Natural Reserve, there were no signposts nor marked trails straight down to the lake. We, however, saw a path marked with yellow-tipped sticks which we took. We descended in a grassy and blossoming slope, and merged temporarily with a trail circling from the west (in Ravin Mélivrin). Eventually we came to a spot above the lake. It looked more like a pond, and was dry this time of the year. There was a cottage by the lake and a shelter a bit further in the east as it was a pasturage area.

It was a tranquil spot, far from the ski lift system. The forest covered northern face of Crête de la Bréssiere dominated the beautiful scenery across the lake. 

We returned along the same trail shown on the map below.