The Arrats is a long

river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...

in southern

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

, left tributary of the

Garonne The Garonne ( , ; Catalan language, Catalan, Basque language, Basque and , ; or ) is a river that flows in southwest France and northern Spain. It flows from the central Spanish Pyrenees to the Gironde estuary at the French port of Bordeaux � ...

. Its source is in the northern foothills of the

Pyrenees The Pyrenees are a mountain range straddling the border of France and Spain. They extend nearly from their union with the Cantabrian Mountains to Cap de Creus on the Mediterranean coast, reaching a maximum elevation of at the peak of Aneto. ...

, near Sariac-Magnoac. It flows north through the following ''

département In the administrative divisions of France, the department (, ) is one of the three levels of government under the national level (" territorial collectivities"), between the administrative regions and the communes. There are a total of 101 ...

s'' and towns: *

Hautes-Pyrénées Hautes-Pyrénées (; Gascon/ Occitan: ''Nauts Pirenèus / Hauts Pirenèus'' awts piɾeˈnɛʊs ; alts piɾiˈneʊs ) is a department in the region of Occitania, southwestern France. The department is bordered by Pyrénées-Atlantiques to t ...

Gers Gers (; or , ) is a departments of France, department in the regions of France, region of Occitania (administrative region), Occitania, Southwestern France. Gers is bordered by the departments of Hautes-Pyrénées and Pyrénées-Atlantiques to ...

Castelnau-Barbarens Castelnau-Barbarens ( Gascon: ''Castèthnau Barbarens'') is a commune in the Gers department in southwestern France. Geography Population See also *Communes of the Gers department The following is a list of the 458 communes of the ...

Aubiet Aubiet () is a commune in the Gers department in southwestern France. Geography Localisation Roads and transports National road 124, which goes from Toulouse to Auch, passes by Aubiet. Aubiet has a train station. Population See al ...

, Mauvezin,

Saint-Clar Saint-Clar (; ) is a commune in the Gers department in southwestern France. Geography The river Arrats forms most of the commune's eastern border; the Auroue flows north through the western part of the commune. History Saint-Clar was fou ...

Tarn-et-Garonne Tarn-et-Garonne (; ) is a Departments of France, department in the Occitania (administrative region), Occitania Regions of France, region in Southern France. It is traversed by the rivers Tarn (river), Tarn and Garonne, from which it takes its n ...

: Saint-Loup It flows into the

near Valence, between

Castelsarrasin Castelsarrasin (; ) is a commune in the Tarn-et-Garonne department in Occitanie region of France. The inhabitants are called ''Castelsarrasinois''. It is the second most populous commune in Tarn-et-Garonne after Montauban. It is served by Ca ...

and

Agen Agen (, , ) is the prefecture of the Lot-et-Garonne department in Nouvelle-Aquitaine, Southwestern France. It lies on the river Garonne, southeast of Bordeaux. In 2021, the commune had a population of 32,485. Geography The city of Agen l ...

References

Rivers of France Rivers of Gers Rivers of Tarn-et-Garonne Rivers of Hautes-Pyrénées Rivers of Occitania (administrative region) {{France-river-stub