The Great Basin is mainly classified as an arid region.

The Great Basin is primarily classified as an arid region due to its dry climate, characterized by low rainfall and limited water sources. While the region contains desert-like areas, it isn't classified as a true desert. The basin’s landscape includes salt flats, mountain ranges, and dry lakebeds, which contribute to its overall aridity. The Great Basin experiences significant temperature fluctuations, with hot summers and cold winters. Its unique geography results in a distinctive climate where precipitation is scarce, making it an ideal example of an arid region in the United States.