Sep 12, 2008. One of France's many "Grande Routes" or marked walking routes, the. the course of the six-day hike, your guide will explain Pyrenean history, Hike the best trails of France's Pyrenees National Park, including the famed GR10 and the dramatic amphitheater called the Cirque de Gavarnie, with overnights. When Carol and Stephens Lytch, of Lancaster, first began hiking Spain’s famed Camino de Santiago. as it winds its way…