It's fine as far as it goes, Damián but it just covers a small part of Spain: nothing in Vizcaya, Cantabria, Asturias or Galicia. If I were 'trekking' in Spain, those regions would be at the top of my list. The Camino Francés is notable by its absence, as is Extremadura and the western parts of Andalucia (Huelva, west of the Donaña).