The route begins in the village of Andoin, shortly after we will cross a small step on the river. After about 300 meters we will reach a fork of roads and continue on the left, passing through a metal barrier.  Later there is another fork.

We will continue for the track of the right leaving to the left the path that runs next to the fenced livestock. Following this direction, we find another fork of paths. We will take the one on the left and a few meters we must cross another metal barrier. From here we will follow the trail of ancient beeches and oaks until we reach the spring of the river.  

There is a small azud and a catchment for sourcing. If we cross the river and continue for a small path of the right margin, parallel to the riverbed, we will arrive until the source of the river. In this last section, as long as we make the journey in the rainy season, we can enjoy several water jumps, some of them of great beauty.  

The return can be done by the same path.