RANDONNÉE AU RU DE BY

Start: Plan Détruit Champillon-Doues, 2,076 m. Finish: Conca di By-Ollomont, 2,047 m (ascent -29 m). Time: 2 hours.

A fine route on almost flat terrain along the Ru de By to discover the valley of the same name. The starting hamlet is reached via the road to the hill of Doues. From the parking lot, take the forest path (TDC - Tour des Combins) and then the path parallel to the ru, which initially runs alongside the road on the left. You arrive at the cirque de By, a wide green expanse with a turquoise-blue lake in which the mountains admire their reflection.