Alexandra Canal, a tributary of the Cooks River, is an artificial waterway in southern Sydney, New South Wales, Australia. The canal is Sydney's first inbound waterway. It stretches 4 kilometres (2.5 mi) from the inner Sydney suburb of Alexandria, flowing through the suburbs of St Peters and Mascot, past Sydney's Sydney Airport to the Cooks River at Tempe, which eventually discharges into Botany Bay. The canal is 60 metres (200 ft) wide, increasing to 80 metres (260 ft) at its mouth. and is one of only two navigable canals constructed in New South Wales.