Spain's Sendero Historico: The GR1. Northern Spain - Picos to the Mediterranean, Paperback/John Hayes

Guidebook to the 1250km of Spain's Sendero Historico (GR1), traversing northern Spain from Puerto de Tarna in the province of Leon in the west to the Mediterranean near L'Escala in Catalonia, through fascinating, varied landscapes and the foothills of the Pyrenees. Described in 53 stages, about 25km each in length, with detailed mapping.