The Lower Hopkins Basin includes the lower region of Hopkins River, which flows into the sea at Warrnambool. Mount Emu Creek and Brucknell Creek both flow into the Hopkins in the southern reaches of the river. West of Mortlake, Salt Creek and Muston Creek both join the Hopkins River. The Merri River is a stand-alone river in the Lower Hopkins Basin and also runs out to sea at Warrnambool. Warrnambool is the largest town in the region, with smaller towns being Mortlake, Terang, Caramut and Allansford.