Officially designated as a river,[1] the Cooba Bulga Stream rises on the southern slopes of the Liverpool Range within the Great Dividing Range about 1.6 kilometres (0.99 mi) south of Omaleah Cliffs. The river flows generally southwest and then south before reaching its confluence with the Munmurra River near Llangolan. Cooba Bulga Stream descends 786 metres (2,579 ft) over its 31 kilometres (19 mi) course.[2]