Athi-Galana-Sabaki is the longest river in Kenya after the Tana and a great spot for your safari in Kenya. It has a total length of 390 km and drains a basin area of 70,000 km ². The upper course of the river is called Athi; the lower, Galana or Sabaki. Athi River flows across the Kapote and Athi plains, through the Athi River town, takes a northeast direction and is met by the Nairobi River. Near Thika it forms the Fourteen Falls and turns south-south-east under the wooded slopes of the Yatta ridge, which shuts in its basin on the east. Apart from the numerous small feeders of the upper river, almost the only tributary is the Tsavo River, from the east side of Kilimanjaro.
In this part of its course the river flows through the Tsavo East National Park, and its waters are populated by a rich wildlife including hippos and crocodiles. It turns east towards the ocean, and in its lower course, known as the Sabaki (or Galana), traverses the sterile quartz-land of the outer plateau. The valley is in parts low and flat, covered with forest and scrub, and containing small lakes and backwaters connected with the river in the rains. At this season the stream is deep and strong and of a turbid yellow colour. The Sabaki gives rise also to another set of small waterfalls or rapids, known as Lugard Falls. The river flows into the Indian Ocean just north-east of Malindi.