Clayton Bay is a town in South Australia located on Lake Alexandrina and Lower Murray River, part of the lower lakes and Coorong region at the end of the Murray River System. The town is located north of the north-east tip of Hindmarsh Island about 87 kilometres (54 mi) from Adelaide and 30.7 kilometres (19 mi) by road from Goolwa.

Goolwa, known as The Elbow to early settlers, is an historic river port on the Murray River near the Murray Mouth in South Australia. Goolwa is approximately 85 km (53 mi) south of Adelaide, and is joined by a bridge to Hindmarsh Island.