Ubangi River is formed by the confluence of the
Bomu and Uele rivers on the northern border of
the Democratic Republic of the Congo. It flows west from that point to form
the border between the Democratic Republic of the
Congo and Central African Republic, and then south to form part of the
border between the Republic of the Congo and the Democratic Republic of the
Congo. It empties into the Congo River (of which
it is the largest right-bank tributary) near Lake
Tumbia. The total length of the main channel is
about 700 miles (1,126 kilometers), 1,410 miles
(2,270 kilometers) if you include its longest
headwater. The drainage basin covers about
298,400 square miles (772,800 square kilometers).
An important part of the trade network of Central
Africa, the Ubangi is navigable year-round
between Bangui and Brazzaville.