This mountain had been referred in some historical book such as shahnameh in Davazdah Rokhwar as the Zibad mountain and its eastern part is called black mountain or kuh Gonabad. The long mountain range is called Qohestan and it extends from Bajestan to Birjand near the border with Afghanistan. This mountain range separates south khorasan from Razavi Khorasan, part of this mountain range near Kakhk is called black mountain or kuh e gonabad.
