Ewaso Ng'iro is a river in Kenya which rises on the west side of Mount Kenya and flows north then east and finally south-east, passing through Somalia where it joins the Jubba River. The upper basin of the Ewaso Ng'iro River is . The river has a continuous water supply due to the glaciers on Mount Kenya. It is used for canoeing and has up to grade V rapids. The river's name is derived from the local community's language. It means the river of brown or muddy water. It is also called by some the "Ewaso Nyiro."