The Turasha River like the Malewa is a permanent stream. It drains the north Kinangop plateau and the mountain range to the east of it. It follows a u-shaped course, flowing northwards towards Kinangop plateau collecting tributaries from the forested massif of Kipipiri, before curving right round to join the southward flowing Malewa. Like the Malewa it has excavated a deep- walled cut several hundred feet deep in the flat-topped tuff plateau, and its tributaries are similarly incised. The deep steep-walled incisions of these river valleys appear to be due to the sudden lowering of base level in the floor.
