ÉchezThe Échez is a left tributary of the Adour, in the Hautes-Pyrénées, in the Southwest of France. It is long.GeographyThe Échez rises in Sère-Lanso and flows north along the Adour, which it joins in Maubourguet. It flows through Tarbes and Vic-en-Bigorre.Main tributaries Aube, Jeune, Gespe, in Tarbes, Souy, Géline, from the plateau of Ger Lis, from Ger.