The Spīn Ghar or Safēd Kōh meaning both White Mountains, or sometimes meaning white mountain range, is a mountain range to the south of the Hindu Kush. It ranges from eastern Afghanistan into Khyber Pakhtunkhwa, Pakistan, and forms a natural border between the two areas. Its highest peak is Mount Sikaram on the Afghanistan–Pakistan border, which towers above all surrounding hills to 4,755 m (15,600 ft) above mean sea level. The lower hills are mostly barren and treeless, but pine grows on the main mountains that form the East Afghan montane conifer forests.

The Hindu Kush is an 800-kilometre-long (500 mi) mountain range on the Iranian Plateau in Central and South Asia to the west of the Himalayas. It stretches from central and eastern Afghanistan into northwestern Pakistan and far southeastern Tajikistan. The range forms the western section of the Hindu Kush Himalayan Region (HKH); to the north, near its northeastern end, the Hindu Kush buttresses the Pamir Mountains near the point where the borders of China, Pakistan and Afghanistan meet, after which it runs southwest through Pakistan and into Afghanistan near their border.