The Auroue is a 62.4-kilometre (38.8 mi) long river in the Gers, Lot-et-Garonne and Tarn-et-Garonne départements, south western France. Its source is at Crastes, 15 kilometres (9 mi) northeast of Auch. It flows generally north. It is a left tributary of the Garonne into which it flows between Saint-Sixte and Saint-Nicolas-de-la-Balerme, 13 kilometres (8 mi) southeast of Agen.