The South Australian gulf drainage division is the area surrounding the Gulf St Vincent and Spencer Gulf and a sliver of country to the immediate north. It includes 75,000 square kilometres of mostly moderately flat territory, broken only by the Mount Lofty Ranges which reach 932 metres at their highest point. It is bounded by the Murray-Darling Basin to the east, the Lake Eyre Basin to the north, and the Western Plateau to the west.