Cascade Sidonie is a waterfall in the French Pyrenees, just outside Saint Mamet (Bagneres de Luchon) on the way to Col de Portillon.
From Bagneres de Luchon drive to Col de Portillon on road D618A which also goes into Spain. At the moment the road goes up and there are some sharp bends in the road, there is Cascade Sidonie located (after the second sharp curve in the road). There is a small pocket in teh road where you can park your car (gps 42.769328, 0.620932).
The river Ruisseau de Burbe cascades down creating a 35 meter high waterfall Cascade Sidonie. Cascade Sidonie had two major drops and is nice to see, but nothing special.