The M'pozo is a river in the province of Bas-Congo

Bas-Congo

Bas-Congo is one of the eleven provinces of the Democratic Republic of the Congo. It is the only province with a coastline and it borders Bandundu province to the east and Kinshasa to the northeast...

 in the Democratic Republic of the Congo

Democratic Republic of the Congo

The Democratic Republic of the Congo is a state located in Central Africa. It is the second largest country in Africa by area and the eleventh largest in the world...

. Its source is located in Angola

Angola

Angola, officially the Republic of Angola , is a country in south-central Africa bordered by Namibia on the south, the Democratic Republic of the Congo on the north, and Zambia on the east; its west coast is on the Atlantic Ocean with Luanda as its capital city...

. The river ends on the left bank of the Congo River

Congo River

The Congo River is a river in Africa, and is the deepest river in the world, with measured depths in excess of . It is the second largest river in the world by volume of water discharged, though it has only one-fifth the volume of the world's largest river, the Amazon...

, a few kilometres upstream of Matadi

Matadi

Matadi is the chief sea port of the Democratic Republic of the Congo and the capital of the Bas-Congo province. It has a population of 245,862 . Matadi is situated on the left bank of the Congo River from the mouth and below the last navigable point before rapids make the river impassable for a...

.

The river is especially known for the lower part of its course and for its canyon, which is used by the Matadi–Kinshasa Railway, and which constituted the principal difficulty during the construction of this railway line at the end of the 19th century.