Gokprosh consists of a single ridge at the eastern end which, however, gradually widens into the usual collection of parallel ridges as it approaches the western boundary of the country. Here the little valley of Kastag is to be found enclosed within it. Midway in its length, the Nihing and Kech rivers join at Kaur-e-awaran and, forming the Dasht river, break southward through a fine gorge known as Gatt.