Ourse

Ourse
Confluence of the Ourse de Sost (left) and the Ourse de Ferrère (right) at Mauléon
Show map of France Show map of Occitanie
Location
Country	France
Physical characteristics
Source
• location	Pyrenees
Mouth
• location	Garonne
• coordinates	43°01′18″N 0°36′55″E / 43.0217°N 0.6153°E / 43.0217; 0.6153
Length	25.4 km (15.8 mi)
Basin size	139 km2 (54 sq mi)
Basin features
Progression	Garonne→ Gironde estuary→ Atlantic Ocean

The Ourse, or Ourse de Ferrère, is a French river in the Pyrenees, a tributary of the Garonne. It is 25.4 km (15.8 mi) long.^[1] It forms the Barousse valley.

According to the Sandre, its mother-course is the ruisseau de Seuès^[1] which begins at 1,770 m high, NNW of the lac de Crouès.^[2]

After a few km, it is joined left by the Salabe runlet and then becomes l'Ourse de Ferrère, which joins l'Ourse de Sost at Mauléon-Barousse and then becomes l'Ourse.

It joins the Garonne left bank at 441 m high in the commune of Loures-Barousse.^[2]

The stream length of the path « Ruisseau de Seuès-Ourse de Ferrère-Ourse » is 25.4 km,^[1] for a watershed of 139 km².^[3]

L'Ourse runs through 13 communes in the Hautes-Pyrénées, all located in the canton of Mauléon-Barousse, from high to low : Ferrère, Ourde, Mauléon-Barousse, Troubat, Bramevaque, Gembrie, Antichan, Créchets, Anla, Aveux, Sarp, Izaourt, et Loures-Barousse.

It has 20 tributaries recorded by the Sandre,^[1] of which two are more than 5 km long :

• the Salabe, 6.0 km, left bank,^[4]
• l'Ourse de Sost, 12,4 km, right bank.^[5]