Irrigation water is available from the South Platte, the Arkansas River, and a few other streams, and also from subterranean sources, including artesian wells.However, heavy use of ground water from wells for irrigation has caused underground water reserves to decline.
On the other side of the Rockies, the significant population centers in Western Colorado (which is not considered the "Front Range") are the cities of Grand Junction, Durango, and Montrose.
The Continental Divide of the Americas extends along the crest of the Rocky Mountains.
Colorado is noted for its vivid landscape of mountains, forests, high plains, mesas, canyons, plateaus, rivers, and desert lands.
Colorado is considered part of the western or southwestern Unites States, and one of the Mountain 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.
The "Front Range" includes Denver, Boulder, Fort Collins, Loveland, Colorado Springs, Pueblo, Greeley and other townships and municipalities in between.The Colorado plains were mostly prairies, but they have many patches of deciduous forests, buttes, and canyons.Eastern Colorado is presently mainly covered in farmland and rangeland, along with small farming villages and towns.Within the interior of the Rocky Mountains are several large parks which are high broad basins.In the north, on the east side of the Continental Divide is the North Park of Colorado.The area of Colorado to the west of the Continental Divide is called the Western Slope of Colorado.