The land in Muranga County rises gradually from an altitude of 914 ms in the East to 3353 ms along the slopes of the Aberdare Range – where the rugged landscape composed of steep valleys punctuated by numerous hills, very often associated with Muranga, is most prevalent.
The highest areas to the West have a deeply dissected topography and are well-drained by several rivers like Mathioya and Maragwa which flow eastwards to join the Tana River. The Kikuyu land is bounded by the four mountains – Mount Kenya (Kirinyaga), Ngong Hills (Kiri Mbiruiru), the Aberdares (Nyandarua), and Ol Donyo Sabuk (Kia Njahi). In August 1900, Francis Hall arrived in Muranga, in the company of a regiment of East African Rifles, and set base near present-day Muranga, then Fort Hall.
Most of these valleys in Muranga County have sparkling streams and rivers flowing in them – rising from the Aberdare Forest – and which provide both serenity and spectacular beauty. As you near Thika, the rugged hilly landscape evens out and rolls out into flatter plains.