Cascade de Fontaine Blanche is a mountain waterfall near Monthey (Morgins) in the region Valais, Switzerland.
From Monthey drive to Morgins. In the centre there is an exit to Route de Chésery. I think it is possible to go there by car. After a few kilometer stay right at a crossing, the road gets quite narrow here. After 5 kilometer from Morgins you will see Cascade de Fontaine Blanche at the right side of the road. A little further there is a parking at a restaurant (gps 46.203920, 6.823912).
It is also possible to take the hiking route from Morgins (5 kilometer one way) that leads along the river « lac de Chesery ». Maybe a better and nicer option. I think the walk will take 90 minutes one way.