The start of the route can be found in O Seixo, next to the chapel of Nosa Señora das Angustias. The route crosses the nucleus of Prado and runs alongside a huge hórrea (more information in the next section).

After walking through a mixed forest, you will reach San Miguel de Castro. Its church has undergone multiple interventions over the centuries, but it still retains Romanesque remains in its apse and triumphal arch dating from before 1115.

It descends to the Ulla River, running along its banks through a humid forest. Caution should be exercised in rainy seasons, since the channel may overflow onto the route itself. At a point marked clearly with an arrow, you must come off the route for 50 metres in order to enjoy an impressive view of the Gundián bridges, where the Ulla river creates a beautiful canyon.

Before reaching the end of the route, it is highly recommended that you ascend to the O Castro viewpoint and enjoy the panoramic view of the Ulla river and the Gundián bridges. After your trip, you should visit to the Sanctuary of Gundián recreation area.