It is the 11th longest river in the world
and has the 9th largest watershed. It is the greatest Russian river with its watershed entirely within national ranges.
length = 4,472 km (2,734 mi)
elevation = 1,640 m (5,381 ft)
watershed = 2,500,000 km² (965,250 mi²)
The river rises in the western slopes of the Baikal Range 12 km west of Lake Baikal.
At its mouth into the Laptev Sea in northern Siberia, the river forms a huge delta, which is the largest Arctic delta, and the most extensive protected wilderness area in Russia.
delta = 32,000