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Blue Nile, South Gonder, Amhara Region, Ethiopia (11.48883 37.58483)
Although there are several feeder streams that flow into Lake Tana, the sacred source of the river is generally considered to be a small spring at Gish Abay, situated at an elevation of approximately 2,744 metres (9,003 ft). This stream, known as the Gilgel Abay (Lesser Abay River), flows north into Lake Tana. Other affluents of this lake include, in clockwise order from Gorgora, the Magech River, the Northern Gumara, the Reb River, the southern Gumara River, and the Kilte. Lake Tana's outflow then flows some 30 kilometres (19 mi) before plunging over the Blue Nile Falls. The river then loops across northwest Ethiopia through a series of deep valleys and canyons into Sudan, by which point it is only known as the Blue Nile.
Southern Nations, Nationalities, and Peoples Region (SNNPR), South Omo, SNNPR, Ethiopia (6.03041 36.60585)
Coordinates: 6.01041 36.58585 6.05041 36.62585 - Minimum elevation: 1,553 m - Maximum elevation: 3,212 m - Average elevation: 2,355 m