The Mali Pek comes down from the northern slopes of the Liškovac mountain, flows to the southwest through the city of Majdanpek, one of the major mining centers of Serbia (city's name itself, "Majdan-pek", means "Mine on the Pek"). After a short course, the Pek reaches the western side of the Homolje mountains and flows in into the river "Lipa" at the village of Debeli Lug. Measured from the Lipa source, Pek is 129 km long, measured from its own, 110 km.