It is 650 km long, flowing from the Naukluft Mountains[1] 150 km to the Hardap Dam near Mariental.

From there the flow is entirely blocked,[1] all further flow downstream coming from tributaries downstream from the dam.

Despite this, the river is the site of the spectacular Fish River Canyon, a canyon 160 km long, and at points as much as 550 m deep.

The outflow of the Fish River joins the Orange River at the border with South Africa about 100 km from the Atlantic Ocean.

This article related to a river in Namibia is a stub.