From Biescas drive to Torla over road N260a, take the turn to Torla and Parque Nacional de Ordesa. There is the entry of the parc where it is possible to take several hikes. We choose the easy one, along the river Arazas, to the end of the valley where you pass by the Gradas Soasa.
From the parc entry near Torla is takes about 3 hours to get to the falls. On the road/trail to Cascada Cola de Caballo you will pass by several waterfalls that are even more beautiful then Cascada Cola de Caballo: Casada del Estrecho, Cascada de Cotatuero (from a distance), Gradas de Soasa, Cascada de Arripas and several other small or unnamed falls.
I really can say this is one of the best hikes I’d ever take with beautiful sceneries and wildlife. So don’t miss it.