Question: where is the blue nile river located on a map

title: Blue Nile
text: Although a number of European explorers contemplated tracing the course of the Blue Nile from its confluence with the White Nile to Lake Tana , its gorge , which begins a few kilometres inside the Ethiopian border , has discouraged all attempts since Frédéric Cailliaud 's attempt in 1821 . The first serious attempt by a non-local to explore this reach of the river was undertaken by the American W.W. Macmillan in 1902 , assisted by the Norwegian explorer B.H. Jenssen ; Jenssen would proceed upriver from Khartoum while Macmillan sailed downstream from Lake Tana . However , Jenssen 's boats were blocked by the rapids at Famaka short of the Sudan - Ethiopian border , and Macmillan 's boats were wrecked shortly after they had been launched . Macmillan encouraged Jenssen to try to sail upstream from Khartoum again in 1905 , but he was forced to stop 500 kilometres ( 300 mi ) short of Lake Tana . R.E. Cheesman , who records his surprise on arriving in Ethiopia at finding that the upper waters of `` one of the most famous of the rivers of the world , and one whose name was well known to the ancients '' was in his lifetime `` marked on the map by dotted lines '' , managed to map the upper course of the Blue Nile between 1925 -- 1933 . He did this not by following the river along its banks and through its impassable canyon , but following it from the highlands above , travelling some 8,000 km ( 5,000 mi ) by mule in the adjacent country . New