The landform that includes Nevada and parts of five neighboring states is called The Great Basin. The five neighboring states that have parts of great Basin in it are Utah, California, Oregon, Wyoming and Idaho. The half of Utah falls in the Great Basin. The Great Basin Divide actually separates the watersheds that lead to the Pacific Ocean from the Great Basin. The great Basin covers about 209,162 square miles. This is a very dry region and most of the water either evaporates or sinks inside the ground to flow into different lakes.