Niger River Niger River The Niger River (; , ) is the principal river of West Africa, extending about . Its drainage basin is in area. Its source is in the Guinea Highlands in southeastern Guinea. It runs in a crescent through Mali, Niger, on the border with Benin and then through Nigeria, discharging through a massive delta, known as the Niger Delta or the Oil Rivers, into the Gulf of Guinea in the Atlantic Ocean. The Niger is the third-longest river in Africa, exceeded only by the Nile and the Congo River (also known as the Zaïre River). Its main tributary
White Nile base of Mount Kikizi. The Kagera River, which flows into Lake Victoria near the Tanzanian town of Bukoba, is the longest feeder river for Lake Victoria, although sources do not agree on which is the longest tributary of the Kagera, and hence the most distant source of the Nile itself. The source of the Nile can be considered to be either the Ruvyironza, which emerges in Bururi Province, Burundi, near Bukirasaz or the Nyabarongo, which flows from Nyungwe Forest in Rwanda. These two feeder rivers meet near Rusumo Falls on the border between Rwanda an Tanzania. These waterfalls are known