Simien Mountains National Park is one of the national parks of Ethiopia. Located in the Semien (North) Gondar Zone of the Amhara Region, its territory covers the Simien Mountains and includes Ras Dashan, the highest point in Ethiopia. The Simien Mountains were formed prior to the creation of the Rift Valley, from lava outpourings between 40 and 25 million years ago during the Oligocene period. The volcano is believed to have spread over more than 5000 m2 and resulted in a thick sequence of basaltic lava some 3,000-3,500 m thick that was deposited on Precambrian crystalline basement.
The major part of the Simien Mountains consists of remnants of a Hawaiian-type shield volcano. The Kidus Yared peak is situated near the middle of the shield volcano. Ras Dejen (4,533 m), Bwahit (4,430 m) and Silki (4,420 m) were formed from the outer core of this ancient volcano.