The Camino de Santiago is a 460 mile route crisscrossing Europe. The El Camino Frances is a portion of the route in Spain that traverses rolling plains, farmlands and the Pyrennes. A good starting point is the town of Roncesvalles.
Note: In Spain, mountain biking is known as Bici Todo Terrano (BTT) and the forest tracks open to BTT are known as pistas forestales.
Overall, El Camino Frances is the 9th most popular mountain bike trail of all 20 mountain biking rides in Spain.