The Water of Girvan (or River Girvan) is a river in South Ayrshire, which has its source at Loch Braden Reservoir in the Carrick Forest section of Galloway Forest Park. This 28-mile (45 km) river passes through the villages of Straiton, Kirkmichael and Dailly en-route to the Firth of Clyde at Girvan Harbour.