The Adour flows north for almost a hundred miles through the Hautes-Pyrénées to Gers. There, it turned to the west and gets into the Landes department. In Port-de-Lanne, the Adour is joined by the Gaves réunis river and, finally, it flows into the Bay of Biscay, in the Atlantic Ocean, between Anglet (Pyrénées-Atlantiques) and Tarnos (Landes).