Aruwimi River

An engraving of Stanley's expedition ascending the Aruwimi, from his book In Darkest Africa, 1890 Stanley's routes are indicated by the solid and dashed black lines. The Aruwimi River (Swahili: Mto Aruwimi, French: Rivière Aruwimi) is a tributary of the Congo River, located to the north and east of the Congo.

The Aruwimi begins as the Ituri River, which rises near Lake Albert, in the savannas north of the Kibale River watershed. It then runs generally south southwest until it is joined by the Shari River which flows by Bunia. The Ituri then turns west, through the Ituri Forest, becoming the Aruwimi where the Nepoko (or Nepoki) River joins it, at the town of Bomili. The river continues westward, joining the Congo at Basoko. The length of the Aruwimi–Ituri-Nizi is about 1,287 km (800 mi), with the Ituri being about 650 kilometres (400 mi), the Nizi about 257 kilometres (160 mi) and the Aruwimi about 380 kilometres (240 mi). The Aruwimi is about 1.5 kilometres (0.93 mi) wide where it joins the Congo.