The range is 3500 kilometres 2175 mi in length and runs along the whole east coast of australia. The great dividing range or the eastern highlands is australias largest mountain rangeit is the third longest land based range in the world. https://i.stack.imgur.com/7opPH.png What Is The Tectonic Setting For The Formation Of The Great The range stretches 3600 kilometres from the tropical rainforests of cape york through the alps of nsw and the act to the temperate woodlands of the grampians in western victoria.