The Rumpungwe River rises in Cankuzo Province and flows southeast to the Burundi–Tanzania border.

The Malagarasi River rises less than 20 kilometres (12 mi) from Lake Tanganyika and flows northeast along the Burundi-Tanzania border to its junction with the Rumpungwe.

[2] The river irrigates part of the Commune of Kinyinya in the south of Ruyigi Province.

[3] In November 2016 Christian Joly represented the European Union at the inauguration of a Bailey bridge carrying the RN11 highway over the Rumpungwe River in the Commune of Kinyinya, Ruyigi Province.

[4] In May 2022 hippopotamus along the Rumpungwe River in the Commune of Cendajuru, Cankuzo Province, were destroying rice, cassava and bean crops and terrorizing the local population.