The pass is an 89 km (55 mi) stretch of the Bolan river valley from Rindli in the south to Darwāza near Kolpur in the north. It is made up of a number of narrow gorges and stretches. It connects Quetta with Sibi 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 Bolān Pass is an important pass on the Baluch frontier, connecting Balochistan with Sindh which has always occupied an important place in the history of British campaigns in Afghanistan .
The local population south of the pass predominantly consists of Biraui Tribes,the ethnic group North of the pass consists of mainly Pushtoons, while to west are Baloch.