|• location||Plateau de Lannemezan|
|Length||175.4 km (109.0 mi)|
|Basin size||1,227 km2 (474 sq mi)|
|• average||7.06 m3/s (249 cu ft/s)|
|Progression||Garonne→ Gironde estuary→ Atlantic Ocean|
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 citiesEdit
The Gers passes through the following departments and main towns: