The Spanish GR 7 is 1900 km long. Whether undertaken as a month-long trek or split into stages, it’s ideal for exploring the riches of an area too often focused on the beach holidays of the Costa. GR7 Granada - Route Guides. We suggest you obtain copies of the ING (Instituto Geographico Nacional) 1:25.000 and 1:10,000 sheets. It is part of both the Spanish network of Senderos de Gran Recorrido and the French network of Sentiers de Grandes Randonnées. Down south in Andalucia you could have some perfect walking hiking weather as it rarely gets any snow but possible rains and certainly colder at night. In Andalucia special measure were introduced on 10 November.