Ewaso Ng'iro South is a significant river in Kenya, flowing through the central and southern regions of the country. It originates from the Aberdare Mountains and travels through various landscapes, providing essential water resources for both wildlife and local communities. The river is vital for agriculture and supports diverse ecosystems along its banks. The river is part of the larger Ewaso Ng'iro basin, which plays a crucial role in the region's hydrology. It eventually joins the Ewaso Ng'iro North river, contributing to the overall water supply in the area. The river's health is important for sustaining both human populations and wildlife, particularly in the Samburu National Reserve.