Cavalla River

"Youbou" redirects here. For the small town in western Canada, see Youbou, British Columbia.

The Cavalla River (also known as the Cavally, the Youbou and the Diougou) is a river in West Africa, rising north of Mont Nimba in Guinea, flowing through Ivory Coast, to Zwedru in Liberia, and back to the border with Ivory Coast. It ends in the Gulf of Guinea, situated 21 km (13 mi) east of Harper, Liberia. It forms the southern two-thirds of the international boundary between Liberia and Ivory Coast.

Cavalla river Cavally, Youbou, Diougou
The Cavalla River drains the border areas of Ivory Coast and Liberia.
Location
Countries	Guinea Ivory Coast Liberia
Physical characteristics
Mouth
• location	Gulf of Guinea
• elevation	0 m (0 ft)
Length	515 km (320 mi)
Basin size	29,495 km2 (11,388 sq mi)[1]
Discharge
• location	Near mouth
• average	(Period: 1979–2015) 37.61 km3/a (1,192 m3/s)[1]
Basin features
River system	Cavalla River

It has a length of 515 kilometers (320 mi), and is the longest river in Liberia.^[2] The name is derived from the cavalla horse mackerel found at its mouth.^[3] It is home to the endemic Chiloglanis normani.