Ruvyironza River
Luvironzaa River (bottom center)
Location
Country	Burundi
Country	Tanzania
Physical characteristics
Source	Mount Kikizi
• location	Burundi
Mouth	Ruvuvu River
• location	Kagera Region
Length	182.4 km (113.3 mi)

The Ruvyironza (or Luvironza) River is a river in Africa that is considered by some to be the most remote source of the Nile,^[1] the world's longest river. It rises on Mount Kikizi in Burundi, and flows over the Rurubu River into the Kagera River in Tanzania,^[2] and from there into Lake Victoria. With a total length of 182.4 km (113.3 mi).^{[clarification needed]}