The Werribee River is a 110-kilometer perennial river flowing from the Great Dividing Range in the Wombat State Forest near Korweinguboora, at an elevation of 501 meters, down to its mouth at Port Phillip Bay near Werribee South. It traverses a diverse landscape from its headwaters through the Werribee Gorge State Park, past market gardens at Bacchus Marsh, and through urban and coastal plains before entering the bay. The river offers a wide spectrum of fishing opportunities, transitioning from freshwater species in its upper reaches to estuarine and marine species in its lower sections and mouth. A linear park follows much of its course, providing public access, though some areas require specific permits for entry.