Start from car park P2 above Place de la Madeleine in Saint-François-Longchamp, just below the balneotherapy centre
(S) Walk down the road towards Place de la Madeleine. Just before the recycling bins, take the path leading down to the right to reach the Torrent du Bugeon through the woodland.
(1) Cross the stream, then head back up to the road. Turn left onto the road and head downhill until you reach the hamlet of Colombes.
(2) Continue along this road; at the end of the descent, you’ll reach the Y-junction just before the hamlet of Le Replat.
(3) Turn right onto the footpath, begin the climb here, and reach a crossroads of footpaths at the edge of a woodland.
(4) Turn left and cross the Ruisseau du Replat. Continue slightly uphill through the woodland until you reach the Ruisseau du Tremblay.
(5) Cross it, then follow the path to the left. After a gentle descent, you’ll reach the Ruisseau du Praz.
(6) Carry on along an almost flat path, then, after a final climb, reach a track running alongside the Ruisseau de la Grande Rigole.
(7) Take this track to the left and head downhill to reach the lake and the Grand Léchère mountain refuge (E).