The Ninety Mile Beach is a sandy stretch of beach on the south-eastern coastline of the East Gippsland region of Victoria in Australia. The beach faces Bass Strait and backs the Gippsland Lakes. The beach is just over 151 kilometres (94 mi) in length, running north-eastward from a spit near Port Albert to the man-made channel at Lakes Entrance.

The Gippsland Lakes are a network of coastal lakes, marshes and lagoons in East Gippsland, Victoria, Australia covering an overall area of about 354 km2 (137 sq mi) between the rural towns of Lakes Entrance, Bairnsdale and Sale. The largest of the lakes are Lake Wellington, Lake King and Lake Victoria. The lakes are collectively fed by the Avon, Thomson, Latrobe, Mitchell, Nicholson and Tambo Rivers, and drain into Bass Strait through a short canal about 2 km (1.2 mi) southwest of Lakes Entrance town centre.