Victoria is the southernmost mainland state of Australia. With an area of 227,594 km² (87,874.5 sq mi), it is Australia's sixth largest state or territory. The State is comparable in size to the US state of Utah or the island of Great Britain. It is bound to the northwest by South Australia, directly north by New South Wales, and also shares a maritime border with Tasmania to the south, across the Bass Strait. Most of Victoria's northern border lies along the Murray River. The eastern half of the state is dominated by the Great Dividing Range and the surrounding uplands, which also to a lesser extent extend far into the west of the state and ease off after The Grampians. By comparison the north and northwest of the state is extremely flat with little prominence.