France–Spain border
The France–Spain border was formally defined in 1659. It separates the two countries from Hendaye and Irun in the west, running through the Pyrenees to Cerberus and Portbou on the Mediterranean.
The Franco-Spanish border runs for 656.3 kilometres (407.8 mi) between southwestern France and northeastern Spain. It begins in the west on the Bay of Biscay at the French city of Hendaye and the Spanish city of Irun (43°22′32″N 01°47′31″W / 43.37556°N 1.79194°W). The border continues eastward along the Pyrenees to Andorra (42°36′13″N 1°26′30″E / 42.60361°N 1.44167°E). At this point, the small country interrupts the border between Spain and France for 63.7 km on the Spanish side and 56 km on the French side. Then it continues eastward (42°30′09″N 01°43′34″E / 42.50250°N 1.72611°E) to the Mediterranean Sea at Cerbère in France and Portbou in Spain (42°26′09″N 03°10′26″E / 42.43583°N 3.17389°E).
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