The Makongo flows through the province of Bas-Uélé in a generally NNE direction to its confluence with the Bomokandi.

During their migration some of them stayed beside the Makongo River in the eastern part of Poko Territory, at least 200 kilometres (120 mi) from the area they occupy today.

[citation needed] The Congo-Nile Expedition of Willem Frans Van Kerckhoven passed through the region in 1891.

[4] In late October 1891 the Ababua chief Sikito defeated the trader Purukandu on the route from the Boyoma Falls to the Makongo.

According to Gustave Gustin the meeting must have taken place on the upper Bima River in mountainous terrain.