The Bolan Pass is a mountain pass through the Toba Kakar Range of Balochistan province in western Pakistan, 120 km (75 mi) from the Afghanistan border. The pass is an 89 km (55 mi) stretch of the Bolan river valley from Rindli in the south to Darw?za near Kolpur in the north. It is made up of a number of narrow gorges and stretches. It connects Sibi with Quetta both by road and railway. Strategically located, traders, invaders, and nomadic tribes have also used it as a gateway to and from South Asia. The Bol?n Pass is an important pass on the Baluch frontier, connecting Jacobabad and Sibi with Quetta, which has always occupied an important place in the history of British campaigns in Afghanistan. The local population predominantly consists of Brahvi tribes, who extend from Bolan Pass to Cape Monze on the Arabian Sea. From Sibi the line runs south-west, skirting the hills to Rindli, and originally followed the course of the Bol?n stream to its head on the plateau. The destructive action of floods, however, led to the abandonment of this alignment. The railway now follows the Mashkaf valley (which debouches into the plains close to Sibi), and is carried from near the head of the Mashkaf to a junction with the Bol?n at Machh. GPS coordinates are 29.453516°N 67.494648°E.