Adelaide is north of the Fleurieu Peninsula, on the Adelaide Plains between the Gulf St Vincent and the low-lying Mount Lofty Ranges. The city stretches from the coast to the foothills, and from Gawler at its northern extent to Sellicks Beach in the south. According to the Regional Development Australia, an Australian government planning initiative, the Adelaide Metropolitan Region has a total land area of , while a more expansive definition by the Australian Bureau of Statistics defines a Greater Adelaide statistical area totalling . The city sits at an average elevation of above sea level. Mount Lofty, east of the Adelaide metropolitan region in the Adelaide Hills at an elevation of , is the tallest point of the city and in the state south of Burra.