From the top of Flegere gondola take the path to Lac Blanc, after you visit and enjoy Lac Blanc, follow the trail with direction Lacs de Cheresys. On that section of the trail you will meet a delicate passage of ladders from where you keep left until you reach Cheresys lakes. From there the path is clearly marked and it descents steeply towards the road. When you reach the road you cross it and a short descent path will take you to the Montroc train station.