It traverses some 370 km of the Atalaia do Norte municipality in the Amazonas state of north-western Brazil.

The Ituí is a left tributary of the Javary River.

It drains a very low gradient, dropping hardly 100 m over its whole extent, which results in extensive meandering.

Downstream it joins the Itaquai River to form the upper Solimões.

This article related to a river in the Brazilian state of Amazonas is a stub.