Biarritz is a seaside town in the Southwest of France, near the Spanish border.
Going South (Portugal, Spain, etc.)
I got a lift off a car driver on the Boulevard Marcel Dassault just South of Biarritz (less than 1 KM from the airport). There are many roundabouts on this road leading to the A63 Motorway. It took me 5 minutes to get a ride. There appears to be a lot of international traffic in this region.