Cascade de Bonavau is a small waterfall near La Saufla (Champery) in the region Valais, Switzerland.
In Champery drive as far as possible following the road to the cable car parking (gps 46.163990, 6.860174). From the parking follow the river Saufla upstream. The trail runs at the right side of the river in the beginning but further upstream you have to cross the river. The trail runs up ascending over 300 meter in 2-3 kilometer. I think the walk to base of Cascade de Bonavau will take a little over an hour.