The Gers is a river in France. It flows through the Hautes-Pyrénées, Gers and Lot-et-Garonne departments, in the Occitanie and Nouvelle-Aquitaine regions. The Gers department is named after this river.
The river's source is in the Pyrenees. It is a left tributary of the Garonne river. In general, it flows from south to north.
Geography
The Gers river has a length of and a drainage basin with an area of .
Course
The source of the Gers is on the Plateau de Lannemezan, in the Lannemezan commune (Hautes-Pyrénées), at an altitude of .
The Gers passes through the departments and towns of: Hautes-Pyrénées : Lannemezan, Monléon-Magnoac Gers : Chélan, Panassac, Masseube, Seissan, Pavie, Auch, Preignan, Montestruc-sur-Gers, Fleurance, Lectoure Lot-et-Garonne : Astaffort, Layrac
The Gers river flows through 48 communes and 11 cantons.
Finally, it flows into the Garonne river to the south of Agen (Lot-et-Garonne), in the Layrac commune, at of altitude.