Origin of brahmaputra river? The source of the Brahmaputra is located in Angsi Glacier of northern side of Himalaya Range. From its in Angsi Glacier to the mouth, the total length of the Brahmaputra river … is 3,848 km or 2,392 miles.Source: http://news.xinhuanet.com/english2010/china/2011-08/22/c_131067137.htm.rigin of brahmaputra river? The source of the Brahmaputra is located in Angsi Glacier of northern side of Himalaya Range. From its in Angsi Glacier to the mouth, the total length of the Brahmaputra river … is 3,848 km or 2,392 miles.