The Arrats is a 162 km long

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

in southern

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

, left tributary of the

Garonne The Garonne (, also , ; Occitan, Catalan, Basque, and es, Garona, ; la, Garumna or ) is a river of southwest France and northern Spain. It flows from the central Spanish Pyrenees to the Gironde estuary at the French port of Bordeaux – a ...

. Its source is in the northern foothills of the

Pyrenees The Pyrenees (; es, Pirineos ; french: Pyrénées ; ca, Pirineu ; eu, Pirinioak ; oc, Pirenèus ; an, Pirineus) is a mountain range straddling the border of France and Spain. It extends nearly from its union with the Cantabrian Mountains to C ...

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

département In the administrative divisions of France, the department (french: département, ) is one of the three levels of government under the national level ("territorial collectivity, territorial collectivities"), between the regions of France, admin ...

s'' and towns: *

Hautes-Pyrénées Hautes-Pyrénées (; Gascon/Occitan: ''Nauts Pirenèus / Hauts Pirenèus'' awts piɾeˈnɛʊs es, Altos Pirineos; ca, Alts Pirineus alts piɾiˈneʊs English: Upper Pyrenees) is a department in the region of Occitania, southwestern France. ...

Gers Gers (; oc, Gers or , ) is a department in the region of Occitania, Southwestern France. Named after the Gers River, its inhabitants are called the ''Gersois'' and ''Gersoises'' in French. In 2019, it had a population of 191,377.

: Castelnau-Barbarens,

Aubiet Aubiet () is a commune in the Gers department in southwestern France. Geography Localisation Roads and transports National road 124, which goes from Toulouse Toulouse ( , ; oc, Tolosa ) is the prefecture of the French department ...

, Mauvezin, Saint-Clar *

Tarn-et-Garonne Tarn-et-Garonne (; oc, Tarn e Garona ) is a department in the Occitania region in Southern France. It is traversed by the rivers Tarn and Garonne, from which it takes its name. The area was originally part of the former provinces of Quercy and ...

: Saint-Loup It flows into the

near Valence, between

Castelsarrasin Castelsarrasin (; oc, Los Sarrasins) 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. I ...

and

Agen The communes of France, commune of Agen (, ; ) is the Prefectures in France, prefecture of the Lot-et-Garonne Departments of France, department in Nouvelle-Aquitaine, southwestern France. It lies on the river Garonne southeast of Bordeaux. ...

References

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