 It is Utah's smallest county by land area and second smallest by total area.The county lies generally between the Great Salt Lake on the west and the Wasatch Range on the east, which rises to a height of in the county at Thurston Peak.The Great Salt Lake is surrounded by marshland and mudflats, and lies at an average elevation of approximately , varying depending on the water level, which can lead to drastic changes in the lake size due to its shallowness.