The GR 70, also known as the Chemin de Stevenson or the Robert Louis Stevenson Trail, is a Grande Randonnée that runs through the French departments of Haute-Loire, Lozère and Gard in a generally north–south direction from Le Monastier-sur-Gazeille to Saint-Jean-du-Gard. It follows approximately the route taken by Robert Louis Stevenson in 1878, a journey described in his book Travels with a Donkey in the Cévennes.
Although not on the formal route, many hikers begin at Le-Puy-en-Velay and walk to Le Monastier-sur-Gazeille via a section of the GR 430. Similarly, many walkers continue beyond the official end-point of Saint-Jean-du-Gard to Alès via sections of the GR 61 and GR 44 D. Both of these cities have railway stations.