Colorado is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the eighth most extensive and 21st most populous U.S. state. The 2020 United States Census enumerated the population of Colorado at 5,773,714, an increase of 14.80% since the 2010 United States Census.
Colorado is notable for its diverse geography, which includes alpine mountains, high plains, deserts with huge sand dunes, and deep canyons. In 1861, the United States Congress defined the boundaries of the new Territory of Colorado exclusively by lines of latitude and longitude, stretching from 37°N to 41°N latitude, and from 102°02′48″W to 109°02′48″W longitude (25°W to 32°W from the Washington Meridian).Â
After 161 years of government surveys, the borders of Colorado were officially defined by 697 boundary markers and 697 straight boundary lines. Colorado, Wyoming, and Utah are the only states that have their borders defined solely by straight boundary lines with no natural features. The southwest corner of Colorado is the Four Corners Monument at 36°59′56″N, 109°2′43″W. The Four Corners Monument, located at the place where Colorado, New Mexico, Arizona, and Utah meet, is the only place in the United States where four states meet.
Approximately half of Colorado is flat and rolling land. East of the Rocky Mountains are the Colorado Eastern Plains of the High Plains, the section of the Great Plains within Nebraska at elevations ranging from roughly 3,350 to 7,500 feet (1,020 to 2,290 m). The Colorado plains are mostly prairies but also include deciduous forests, buttes, and canyons. Precipitation averages 15 to 25 inches (380 to 640 mm) annually.
Eastern Colorado is presently mainly farmland and rangeland, along with small farming villages and towns. Corn, wheat, hay, soybeans, and oats are all typical crops. Most villages and towns in this region boast both a water tower and a grain elevator. Irrigation water is available from both surface and subterranean sources. Surface water sources include the South Platte, the Arkansas River, and a few other streams. Subterranean water is generally accessed through artesian wells. Heavy usage of these wells for irrigation purposes caused underground water reserves to decline in the region. Eastern Colorado also hosts a considerable amount and range of livestock, such as cattle ranches and hog farms.
To the west of the Great Plains of Colorado rises the eastern slope of the Rocky Mountains. Notable peaks of the Rocky Mountains include Longs Peak, Mount Evans, Pikes Peak, and the Spanish Peaks near Walsenburg, in southern Colorado. This area drains to the east and the southeast, ultimately either via the Mississippi River or the Rio Grande into the Gulf of Mexico.
The Rocky Mountains within Colorado contain 53 true peaks with a total of 58 that are 14,000 feet (4,267 m) or higher in elevation above sea level, known as fourteeners. These mountains are largely covered with trees such as conifers and aspens up to the tree line, at an elevation of about 12,000 feet (3,658 m) in southern Colorado to about 10,500 feet (3,200 m) in northern Colorado. Above this tree line only alpine vegetation grows. Only small parts of the Colorado Rockies are snow-covered year-round.
The Continental Divide of the Americas extends along the crest of the Rocky Mountains. The area of Colorado to the west of the Continental Divide is called the Western Slope of Colorado. West of the Continental Divide, water flows to the southwest via the Colorado River and the Green River into the Gulf of California.
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 North Park is drained by the North Platte River, which flows north into Wyoming and Nebraska. Just to the south of North Park, but on the western side of the Continental Divide, is the Middle Park of Colorado, which is drained by the Colorado River. The South Park of Colorado is the region of the headwaters of the South Platte River.
The high desert lands that make up the San Luis Valley in Southern Colorado In south central 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. The Rio Grande drains due south into New Mexico, Mexico, and Texas. Across the Sangre de Cristo Range to the east of the San Luis Valley lies the Wet Mountain Valley. These basins, particularly the San Luis Valley, lie along the Rio Grande Rift, a major geological formation of the Rocky Mountains, and its branches.
The Colorado National Monument near Grand Junction is made up of high desert canyons and sandstone rock formations The Western Slope area of Colorado includes the western face of the Rocky Mountains and all of the state to the western border. This area includes several terrains and climates from alpine mountains to arid deserts. The Western Slope includes many ski resort towns in the Rocky Mountains and towns west of the mountains. It is less populous than the Front Range but includes a large number of national parks and monuments.
The climate of Colorado is more complex than states outside of the Mountain States region. Unlike most other states, southern Colorado is not always warmer than northern Colorado. Most of Colorado is made up of mountains, foothills, high plains, and desert lands. Mountains and surrounding valleys greatly affect local climate. Northeast, east, and southeast Colorado are mostly the high plains, while Northern Colorado is a mix of high plains, foothills, and mountains. Northwest and west Colorado are predominantly mountainous, with some desert lands mixed in. Southwest and southern Colorado are a complex mixture of desert and mountain areas.
The 2020 United States Census enumerated the population of the State of Colorado at 5,773,714, an increase of 14.80% since the 2010 United States Census. The largest future increases are expected in the Front Range Urban Corridor.
People of Hispanic and Latino American (of any race made) heritage made up 20.7% of the population. According to the 2000 Census, the largest ancestry groups in Colorado are German (22%) including of Swiss and Austrian nationalities, Mexican (18%), Irish (12%), and English (12%). Persons reporting German ancestry are especially numerous in the Front Range, the Rockies (west-central counties), and Eastern parts/High Plains.
Colorado has a high proportion of Hispanic, mostly Mexican-American, citizens in Metropolitan Denver, Colorado Springs, as well as the smaller cities of Greeley and Pueblo, and elsewhere. Southern, Southwestern, and Southeastern Colorado has a large number of Hispanos, the descendants of the early settlers of colonial Spanish origin. By 2019, Hispanics made up 22% of Colorado’s population, and Non-Hispanic Whites made up 70%. Spoken English in Colorado has many Spanish idioms.
English, the official language of the state, is the most commonly spoken language in Colorado, followed by Spanish. One Native American language still spoken in Colorado is the Colorado River Numic language also known as the Ute dialect.
Major religious affiliations of the people of Colorado are 64% Christian, of whom there are 44% Protestant, 16% Roman Catholic, 3% Mormon, and 1% Eastern Orthodox. Other religious breakdowns are 1% Jewish, 1% Muslim, 1% Buddhist and 4% other. The religiously unaffiliated make up 29% of the population.
The largest denominations by number of adherents in 2010 were the Catholic Church with 811,630; multi-denominational Evangelical Protestants with 229,981; and The Church of Jesus Christ of Latter-day Saints with 151,433.
The total state product in 2015 was $318.6Â billion. Median Annual Household Income in 2016 was $70,666, 8th in the nation. Per capita personal income in 2010 was $51,940, ranking Colorado 11th in the nation. The state’s economy broadened from its mid-19th-century roots in mining when irrigated agriculture developed, and by the late 19th century, raising livestock had become important. Early industry was based on the extraction and processing of minerals and agricultural products. Current agricultural products are cattle, wheat, dairy products, corn, and hay.
Colorado has significant hydrocarbon resources. According to the Energy Information Administration, Colorado hosts seven of the Nation's hundred largest natural gas fields, and two of its hundred largest oil fields. Conventional and unconventional natural gas output from several Colorado basins typically account for more than five percent of annual U.S. natural gas production. Colorado's oil shale deposits hold an estimated 1 trillion barrels (160 km3) of oil—nearly as much oil as the entire world's proven oil reserves; the economic viability of the oil shale, however, has not been demonstrated. Substantial deposits of bituminous, subbituminous, and lignite coal are found in the state.
Uranium mining in Colorado goes back to 1872, when pitchblende ore was taken from gold mines near Central City, Colorado. Not counting byproduct uranium from phosphate, Colorado is considered to have the third-largest uranium reserves of any U.S. state, behind Wyoming and New Mexico. When Colorado and Utah dominated radium mining from 1910 to 1922, uranium and vanadium were the byproducts (giving towns like present-day Superfund site Uravan their names). Uranium price increases from 2001 to 2007 prompted a number of companies to revive uranium mining in Colorado. During the 1940s, certain communities–including Naturita and Paradox–earned the moniker of "yellowcake towns" from their relationship with uranium mining. Price drops and financing problems in late
2008 forced these companies to cancel or scale back uranium-mining project. As of 2016, there were no major uranium mining operations in the state, though plans existed to restart production.
Colorado's high Rocky Mountain ridges and eastern plains offer wind power potential, and geologic activity in the mountain areas provides potential for geothermal power development. Much of the state is sunny, and could produce solar power. Major rivers flowing from the Rocky Mountains offer hydroelectric power resources.
Colorado’s primary mode of transportation (in terms of passengers) is its highway system. Interstate 25 (I-25) is the primary north–south highway in the state, connecting Pueblo, Colorado Springs, Denver, and Fort Collins, and extending north to Wyoming and south to New Mexico. I-70 is the primary east–west corridor. It connects Grand Junction and the mountain communities with Denver, and enters Utah and Kansas. The state is home to a network of US and Colorado highways that provide access to all principal areas of the state. Many smaller communities are connected to this network only via county roads.
Denver International Airport (DIA) is the fifth-busiest domestic U.S. airport and twentieth busiest airport in the world by passenger traffic. DIA handles by far the largest volume of commercial air traffic in Colorado, and is the busiest U.S. hub airport between Chicago and the Pacific coast, making Denver the most important airport for connecting passenger traffic in the western United States.
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