MTB XC Route, beginning and ending at the "Polo C - Serra d'Ossa no Centro de Cycling de Serra d'Ossa", located in Serra d'Ossa. High skill level route that leaves from the door of the Aldeia da Serra D'Ossa, going North and then crosses the Serra D'Ossa to West. Passing at the entrance door of Rio de Moinhos, but then returns through the mountain following the mountain bike route of this center. Then crosses the Serra to the East and goes down a single track that takes you to the Aldeia da Serra D'Ossa coming from the South.