Geographic information on the layout of the GR® 123 path, which is currently being regularised by the Biscayan Mountain Federation and which runs through the periphery of the Historical Territory of Biscay in 19 stages. The section of the trail that covers the Biscay coastline, from Ondarroa to Muskiz, is also the continuation of the E9 European Coastal Path in Biscay. Coming from France, the E9 crosses Gipuzkoa and continues through Cantabria, Asturias and Galicia, before finally entering Portugal.
Provincial Council of Biscay
Last Modified February 06 2026
