Park your vehicles at the Fionay lakes car park (S).
Between the two lakes, take the good path that passes under the service cable car.
(1). Ignore the two paths that cross to the right, particularly the one that joins the Alpenpässe-Weg.
(2) From this crossroads, the path winds its way up gently, allowing you to reach the cable car station on the right without difficulty.
(3) Continue the ascent and, after a final section of switchbacks, you will reach the plateau before the lake and the Cabane de Louvie (E), today's stop.