Colorado is a state located in the Rocky Mountain region of the United States. It may also be considered part of the Western and Northwestern region and in many cases, Eastern Colorado is considered part of the Midwestern United States. Colorado was nicknamed the "Centennial State". It is bordered to the north by Wyoming, to the south by New Mexico and Oklahoma, at the southwest corner by Arizona, to the east by Nebraska and Kansas and to the west by Utah. The state population was 4,939,456 in 2008. Denver is the capital and the state's most populous city.
The state is well known for its magnificent scenery of mountains, rivers, and lakes. The mountains and surrounding valleys greatly affect the climate, so it can be very unpredictable. The summit of Mount Elbert at 14,440 feet (4,401 m) elevation in Lake County is the state's highest point and the highest point in the entire Rocky Mountains. There are more than 100 mountain peaks that exceed 4,000 meters (13,123 ft) elevation and Colorado is the only U.S. state that lies entirely above 1,000 meters (3,281 ft) elevation. The majority of people live along the eastern edge of the Rocky Mountains in the Front Range Urban Corridor.