Gers (river)

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Auch Haute ville depuis Gers.jpg
Gers River in Auch
Country France
Physical characteristics
Main source Plateau de Lannemezan
River mouth Garonne
44°8′40″N 0°38′52″E / 44.14444°N 0.64778°E / 44.14444; 0.64778 (Garonne-Gers)Coordinates: 44°8′40″N 0°38′52″E / 44.14444°N 0.64778°E / 44.14444; 0.64778 (Garonne-Gers)
Length 175.4 km (109.0 mi)
  • Average rate:
    7.06 m3/s (249 cu ft/s)
Basin features
Progression GaronneAtlantic Ocean
Basin size 1,227 km2 (474 sq mi)

The Gers (French pronunciation: ​[ʒɛːʁ]) (Occitan: Gers) is a 178-kilometre (111 mi) long river in southern France, left tributary of the Garonne.

Its source is in the foothills of the Pyrenees, near Lannemezan. It flows north through the départements Hautes-Pyrénées, Gers and Lot-et-Garonne. It flows into the Garonne in Layrac, near Agen. The city Auch lies along the river Gers. It gives its name to the Gers département.


The name of the Gers appears in the sixth century as Ægirtius, de Egircio flumine and Gircius. It is known as in flumine Gersio in 817 and as Iercius in the 13th century.

Departments and cities[edit]

The Gers river in Ornézan

The Gers passes through the following departments and main towns: