In southmost Colorado is the large San Luis Valley, where the headwaters of the Rio Grande are located.
The valley sits between the Sangre De Cristo Mountains and San Juan Mountains, and consists of large desert lands that eventually run into the mountains.
However, heavy use of ground water from wells for irrigation has caused underground water reserves to decline.
As well as crop agriculture, eastern Colorado hosts considerable livestock, such as cattle ranches and hog farms.
Colorado is the 8th-most extensive and the 21st-most populous of the 50 United States.
This region is partially protected from prevailing storms that blow in from the Pacific Ocean region by the high Rockies in the middle of Colorado.
Eastern Colorado is presently mainly covered in farmland and rangeland, along with small farming villages and towns.
Precipitation is fair, averaging from 15 to 25 inches (380 to 640 mm) annually.
The Territory of Colorado was organized on February 28, 1861, and on August 1, 1876, U. Colorado is nicknamed the "Centennial State" because it became a state a century after the signing of the United States Declaration of Independence.
Colorado is bordered by Wyoming to the north, Nebraska to the northeast, Kansas to the east, Oklahoma to the southeast, New Mexico to the south, Utah to the west, and Arizona to the southwest at the Four Corners.