
Four Corners is a region of the
Southwestern United States
The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural list of regions of the United States, region of the United States that includes Arizona and New Mexico, along with adjacen ...
consisting of the
southwestern corner of
Colorado
Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...
,
southeastern corner of
Utah
Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northea ...
,
northeastern corner of
Arizona
Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...
, and
northwestern corner of
New Mexico
New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...
. Most of the Four Corners region belongs to semi-autonomous
Native American nations, the largest of which is the
Navajo Nation
The Navajo Nation (), also known as Navajoland, is an Indian reservation of Navajo people in the United States. It occupies portions of northeastern Arizona, northwestern New Mexico, and southeastern Utah. The seat of government is located in ...
, followed by
Hopi
The Hopi are Native Americans who primarily live in northeastern Arizona. The majority are enrolled in the Hopi Tribe of Arizona and live on the Hopi Reservation in northeastern Arizona; however, some Hopi people are enrolled in the Colorado ...
,
Ute
Ute or UTE may refer to:
* Ute people, a Native American people of the Great Basin
* Ute Indian Tribe of the Uintah and Ouray Reservation, Utah
* Ute Mountain Ute Tribe, Colorado, New Mexico, and Utah
* Southern Ute Indian Tribe of the Southern ...
, and
Zuni tribal reserves and nations. The Four Corners region is part of a larger region known as the
Colorado Plateau
The Colorado Plateau is a physiographic and desert region of the Intermontane Plateaus, roughly centered on the Four Corners region of the Southwestern United States. This plateau covers an area of 336,700 km2 (130,000 mi2) within w ...
and is mostly rural, rugged, and arid.
The Four Corners area is named after the
quadripoint
A quadripoint is a point on Earth where four distinct political territories meet. The territories can be of different types, such as national and provincial. In North America, several such places are commonly known as Four Corners (disambiguatio ...
at the intersection of approximately 37° north latitude with 109° 03′ west longitude, where the boundaries of the four states meet, and is marked by the
Four Corners Monument
The Four Corners Monument marks the quadripoint in the Southwestern United States where the U.S. state, states of Arizona, Colorado, New Mexico, and Utah meet. It is the only point in the United States shared by four states, leading to the area ...
. It is the only location in the United States where four states meet. In addition to the monument, commonly visited areas within Four Corners include
Monument Valley,
Mesa Verde National Park,
Chaco Canyon
Chaco Culture National Historical Park is a United States National Historical Park in the American Southwest hosting a large concentration of pre-Columbian indigenous ruins of pueblos. The park is located in northwestern New Mexico, betwee ...
,
Canyons of the Ancients National Monument and
Canyon de Chelly National Monument. The most populous city in the Four Corners region is
Farmington, New Mexico
Farmington (Navajo language, Navajo: Tóta') is a city in San Juan County, New Mexico, San Juan County in the U.S. state of New Mexico. As of the 2020 United States census, 2020 census, the city had a population of 46,624 people. Farmington (and ...
, followed by
Durango, Colorado
Durango is the home rule city that is the county seat and the most populous municipality of La Plata County, Colorado, United States. The city population was 19,071 at the 2020 United States census. Durango is the home of Fort Lewis College ...
.
Prehistoric and Indigenous History
The Four Corners region has been inhabited by Indigenous peoples for tens of thousands of years, far earlier than traditionally acknowledged in mainstream archaeology. Paulette F. C. Steeves, in ''The Indigenous Paleolithic of the Western Hemisphere'', argues for a significantly deeper Indigenous presence in North America, supported by archaeological evidence and Indigenous oral histories. Her work challenges long-held assumptions about the timing and nature of human migration into the Americas, suggesting that the Four Corners area was part of ancient settlement patterns and lifeways that have persisted over millennia.
By the time of European contact, the region was home to complex societies such as the Ancestral Puebloans, known for their cliff dwellings, kivas, and extensive trade networks. Charles C. Mann, in ''1491: New Revelations of the Americas Before Columbus'', highlights the sophisticated agricultural, political, and spiritual systems present across the Americas before colonization. Craig Childs, in ''House of Rain: Tracking a Vanished Civilization Across the American Southwest'', retraces ancient migration routes and settlements in the Southwest, offering insights into how the environment and cultural memory shaped the lives of the people who lived in the Four Corners. His work reveals that the land itself holds clues to long-standing Indigenous relationships with place, ceremony, and survival in an arid and challenging landscape.
History
The United States acquired the four corners region from Mexico after the end of the
Mexican–American War
The Mexican–American War (Spanish language, Spanish: ''guerra de Estados Unidos-México, guerra mexicano-estadounidense''), also known in the United States as the Mexican War, and in Mexico as the United States intervention in Mexico, ...
in 1848. In 1863 Congress created the
Arizona Territory
The Territory of Arizona, commonly known as the Arizona Territory, was a territory of the United States that existed from February 24, 1863, until February 14, 1912, when the remaining extent of the territory was admitted to the Union as the ...
from the western part of
New Mexico Territory
The Territory of New Mexico was an organized incorporated territory of the United States from September 9, 1850, until January 6, 1912. It was created from the U.S. provisional government of New Mexico, as a result of '' Nuevo México'' becomi ...
. The boundary was legally defined as a line running due south from the southwest corner of
Colorado Territory
The Territory of Colorado was an organized incorporated territory of the United States that existed from February 28, 1861, until August 1, 1876, when it was admitted to the Union as the 38th State of Colorado.
The territory was organized ...
, which had been created in 1861. This was an unusual act of Congress, which almost always defined the boundaries of new territories as lines of latitude or longitude, or following rivers, but seldom as extensions of other boundaries.
By defining one boundary as starting at the corner of another, Congress ensured the eventual creation of four states meeting at a point, regardless of the inevitable errors of boundary surveying. The area was first surveyed by the U.S. Government in 1868 as part of an effort to make Colorado Territory into a state, the first of the Four Corners states formed. While the US Congress in 1863 intended the corners of Colorado to be placed at the intersections of lines of specific latitude and longitude, due to a "standard" survey error of the time, the originally surveyed location of the "Four Corners" point, along with the corresponding survey marker, was unintentionally placed by its initial surveyor east of the intended location.
[
In 1925, some 57 years after Congress had first attempted to specify the spot, the problems surrounding the originally misplaced marker were brought up before the US Supreme Court. In order to amicably remedy this original surveying error, the US Supreme Court then redefined the point of the Four Corners, officially moving the Four Corners point roughly east, to where the original survey had first held it to be all along, and where it remains to this day, duly marked.][ Correction of mistaken federal survey.
] This initial survey error has resulted in some longstanding misunderstandings about the correct location of the Four Corners marker, some of which remain to this day.
The first Navajo tribal government was established in 1923 to regulate an increasing number of oil exploration activities on Navajo land in the Four Corners area.[
]
Geography
The Four Corners Monument
The Four Corners Monument marks the quadripoint in the Southwestern United States where the U.S. state, states of Arizona, Colorado, New Mexico, and Utah meet. It is the only point in the United States shared by four states, leading to the area ...
is located at .
The Four Corners is part of the high Colorado Plateau
The Colorado Plateau is a physiographic and desert region of the Intermontane Plateaus, roughly centered on the Four Corners region of the Southwestern United States. This plateau covers an area of 336,700 km2 (130,000 mi2) within w ...
. This makes it a center for weather systems, which stabilize on the plateau then proceed eastward through Colorado and into the central states. This weather system creates snow- and rainfall over the central United States.
Federally protected areas in the Four Corners area include Canyon de Chelly National Monument, Hovenweep National Monument, Mesa Verde National Park, and Canyons of the Ancients National Monument. Mountain Ranges in the Four Corners include Sleeping Ute Mountains, Abajo Mountains, and the Chuska Mountains
''
The Chuska Mountains () are an elongate range on the southwest Colorado Plateau and within the Navajo Nation whose highest elevations approach 10,000 feet. The range is about 80 by 15 km (50 by 10 miles). It trends north-northwest and is c ...
.[
]
Politics
Six governments have jurisdictional boundaries at the Four Corners Monument: the states of Arizona, Colorado, New Mexico, and Utah, as well as the tribal governments of the Navajo Nation
The Navajo Nation (), also known as Navajoland, is an Indian reservation of Navajo people in the United States. It occupies portions of northeastern Arizona, northwestern New Mexico, and southeastern Utah. The seat of government is located in ...
and Ute Mountain Ute Tribe
The Ute Mountain Ute Tribe (Ute dialect: Wʉgama Núuchi) is one of three federally recognized tribes of the Ute Nation, and are mostly descendants of the historic Weeminuche Band who moved to the Southern Ute reservation in 1897. Their reservati ...
. The Four Corners Monument itself is administered by the Navajo Nation
The Navajo Nation (), also known as Navajoland, is an Indian reservation of Navajo people in the United States. It occupies portions of northeastern Arizona, northwestern New Mexico, and southeastern Utah. The seat of government is located in ...
Department of Parks and Recreation. Other tribal nations within the Four Corners region include the Hopi
The Hopi are Native Americans who primarily live in northeastern Arizona. The majority are enrolled in the Hopi Tribe of Arizona and live on the Hopi Reservation in northeastern Arizona; however, some Hopi people are enrolled in the Colorado ...
and other Ute
Ute or UTE may refer to:
* Ute people, a Native American people of the Great Basin
* Ute Indian Tribe of the Uintah and Ouray Reservation, Utah
* Ute Mountain Ute Tribe, Colorado, New Mexico, and Utah
* Southern Ute Indian Tribe of the Southern ...
. The Four Corners is home to the capital of the Navajo tribal government at Window Rock, Arizona. The Ute Mountain Ute tribal headquarters are located at Towaoc, Colorado. The US federal government
The Federal Government of the United States of America (U.S. federal government or U.S. government) is the national government of the United States.
The U.S. federal government is composed of three distinct branches: legislative, execut ...
also has a large presence in the area, particularly the Department of the Interior
The United States Department of the Interior (DOI) is an executive department of the U.S. federal government responsible for the management and conservation of most federal lands and natural resources. It also administers programs relatin ...
with the Bureau of Indian Affairs
The Bureau of Indian Affairs (BIA), also known as Indian Affairs (IA), is a United States List of United States federal agencies, federal agency within the U.S. Department of the Interior, Department of the Interior. It is responsible for im ...
and the Department of Agriculture
An agriculture ministry (also called an agriculture department, agriculture board, agriculture council, or agriculture agency, or ministry of rural development) is a ministry charged with agriculture. The ministry is often headed by a minister f ...
with the Forest Service.
Cities
The Four Corners region is mostly rural. The economic hub, largest city, and only metropolitan area
A metropolitan area or metro is a region consisting of a densely populated urban area, urban agglomeration and its surrounding territories which share Industry (economics), industries, commercial areas, Transport infrastructure, transport network ...
in the region is Farmington, New Mexico
Farmington (Navajo language, Navajo: Tóta') is a city in San Juan County, New Mexico, San Juan County in the U.S. state of New Mexico. As of the 2020 United States census, 2020 census, the city had a population of 46,624 people. Farmington (and ...
. The populated settlement closest to the center of Four Corners is Teec Nos Pos, Arizona. Other cities in the region include Cortez and Durango
Durango, officially the Free and Sovereign State of Durango, is one of the 31 states which make up the Political divisions of Mexico, 32 Federal Entities of Mexico, situated in the northwest portion of the country. With a population of 1,832,650 ...
in Colorado; Monticello
Monticello ( ) was the primary residence and plantation of Thomas Jefferson, a Founding Father, author of the Declaration of Independence, and the third president of the United States. Jefferson began designing Monticello after inheriting l ...
and Blanding in Utah; Kayenta and Chinle in Arizona; and Shiprock, Aztec
The Aztecs ( ) were a Mesoamerican civilization that flourished in central Mexico in the Post-Classic stage, post-classic period from 1300 to 1521. The Aztec people included different Indigenous peoples of Mexico, ethnic groups of central ...
, and Bloomfield in New Mexico.[
]
Counties
* San Juan County, New Mexico
San Juan County () is a County (United States), county located in the U.S. state of New Mexico. As of the 2020 United States census, 2020 census, its population was 121,661 making it the fifth-most populous county in New Mexico. Its county ...
* Montezuma County, Colorado
Montezuma County is a county located in the southwest corner of the U.S. state of Colorado. As of the 2020 United States census, 2020 census, the population was 25,849. The county seat is Cortez, Colorado, Cortez. Montezuma County contains m ...
* San Juan County, Utah
San Juan County ( ) is a County (United States), county in the southeastern portion of the U.S. state of Utah. As of the 2020 United States census, the population was 14,518. Its county seat is Monticello, Utah, Monticello, while its most popu ...
* Apache County, Arizona
Apache County is a County (United States), county in the northeast corner of the U.S. state of Arizona. Shaped in a long rectangle running north to south, as of the 2020 United States census, 2020 census, its population was 66,021. The county ...
Transportation
Air service is available via the Durango-La Plata County Airport in Durango, Colorado
Durango is the home rule city that is the county seat and the most populous municipality of La Plata County, Colorado, United States. The city population was 19,071 at the 2020 United States census. Durango is the home of Fort Lewis College ...
, Four Corners Regional Airport in Farmington, New Mexico
Farmington (Navajo language, Navajo: Tóta') is a city in San Juan County, New Mexico, San Juan County in the U.S. state of New Mexico. As of the 2020 United States census, 2020 census, the city had a population of 46,624 people. Farmington (and ...
, and Cortez Municipal Airport in Cortez, Colorado
Cortez () is a List of municipalities in Colorado#Home rule municipality, home-rule municipality that is the county seat and the List of municipalities in Colorado, most populous municipality of Montezuma County, Colorado, United States. The ci ...
. Interstate 40
Interstate 40 (I-40) is a major east–west transcontinental Interstate Highway System, Interstate Highway in the Southeastern United States, southeastern and Southwestern United States, southwestern portions of the United States. At a leng ...
passes along the southern edge of the Four Corners region. The primary U.S. Highways that directly serve the Four Corners include U.S. Route 64, U.S. Route 160 (which serves the Four Corners Monument
The Four Corners Monument marks the quadripoint in the Southwestern United States where the U.S. state, states of Arizona, Colorado, New Mexico, and Utah meet. It is the only point in the United States shared by four states, leading to the area ...
itself), U.S. Route 163, U.S. Route 191, U.S. Route 491 (previously U.S. Route 666), and U.S. Route 550.
The main line of the Atchison, Topeka and Santa Fe Railway
The Atchison, Topeka and Santa Fe Railway , often referred to as the Santa Fe or AT&SF, was one of the largest Class 1 railroads in the United States between 1859 and 1996.
The Santa Fe was a pioneer in intermodal freight transport; at vario ...
, now operated by the BNSF Railway
BNSF Railway is the largest freight railroad in the United States. One of six North American Class I railroads, BNSF has 36,000 employees, of track in 28 states, and over 8,000 locomotives. It has three Transcontinental railroad, transcontine ...
, passes along the southern edge of Four Corners. The area is home to remnants of through railroads that are now heritage railways. These include the Durango and Silverton Narrow Gauge Railroad and the Cumbres and Toltec Scenic Railroad
The Cumbres and Toltec Scenic Railroad, often abbreviated as the C&TSRR, is a Narrow-gauge railway, narrow-gauge Heritage railway, heritage railroad that operates on of track between Antonito, Colorado, and Chama, New Mexico, in the United Sta ...
. The Black Mesa and Lake Powell Railroad, which connects a power plant with a coal mine near Kayenta, comes near the Four Corners.
Helium
The Four Corners region was one of the first locations in the United States in which helium was extracted, and the area is increasingly important as a source of helium supply, with the region being noted for its abundance of high-grade 'green' helium.
The most notable helium field in the region is Arizona's Holbrook basin.
Gallery
File:Four Corners, Southwestern U.S.jpg, False-color satellite image of the Four Corners. Bright red lines are vegetation along the major rivers of the area. The main southeast–northwest river is the San Juan San Juan, Spanish for Saint John (disambiguation), Saint John, most commonly refers to:
* San Juan, Puerto Rico
* San Juan, Argentina
* San Juan, Metro Manila, a highly urbanized city in the Philippines
San Juan may also refer to:
Places Arge ...
. The prominent confluence near the center is the confluence with the Mancos River, in New Mexico. The minor confluence northwest of there is with the Toh Dahstini Wash, which drains to the north from Arizona, joining the San Juan in Colorado near the Utah–Colorado border, just north of Four Corners.
File:Navajo (young boy) 2007.jpg, A young Navajo
The Navajo or Diné are an Indigenous people of the Southwestern United States. Their traditional language is Diné bizaad, a Southern Athabascan language.
The states with the largest Diné populations are Arizona (140,263) and New Mexico (1 ...
boy on horseback in Monument Valley. The Navajo Nation
The Navajo Nation (), also known as Navajoland, is an Indian reservation of Navajo people in the United States. It occupies portions of northeastern Arizona, northwestern New Mexico, and southeastern Utah. The seat of government is located in ...
includes much of the Four Corners area, including the valley, used in many western movies.
File:Four Corners Monument (1).jpg, Flags surrounding the Four Corners Monument
The Four Corners Monument marks the quadripoint in the Southwestern United States where the U.S. state, states of Arizona, Colorado, New Mexico, and Utah meet. It is the only point in the United States shared by four states, leading to the area ...
. In clockwise order starting from the frontmost flag, the state flag
In vexillology, a state flag is either the flag of the government of a sovereign state, or the flag of an individual federated state (subnational administrative division).
Government flag
A state flag is a variant of a national flag (or occas ...
of Arizona
Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...
, flag of the Navajo Nation
The Navajo Nation (), also known as Navajoland, is an Indian reservation of Navajo people in the United States. It occupies portions of northeastern Arizona, northwestern New Mexico, and southeastern Utah. The seat of government is located in ...
, pre-2011 flag of Utah, Navajo nation (second instance)Ute Mountain Ute Tribe
The Ute Mountain Ute Tribe (Ute dialect: Wʉgama Núuchi) is one of three federally recognized tribes of the Ute Nation, and are mostly descendants of the historic Weeminuche Band who moved to the Southern Ute reservation in 1897. Their reservati ...
Reservation, Colorado
Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...
, New Mexico
New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...
, Navajo Nation (third instance), and the flag of the United States
The national flag of the United States, often referred to as the American flag or the U.S. flag, consists of thirteen horizontal Bar (heraldry), stripes, Variation of the field, alternating red and white, with a blue rectangle in the Canton ( ...
.
File:DurangoSilverton1.jpg, The Durango and Silverton Narrow Gauge Railroad, now a heritage railway
A heritage railway or heritage railroad (U.S. usage) is a railway operated as living history to re-create or preserve railway scenes of the past. Heritage railways are often old railway lines preserved in a state depicting a period (or periods) ...
, formerly connected the Four Corners area to the national rail network.
File:Bluff UT - aerial with San Juan River and Comb Ridge.jpg, Bluff, Utah and Comb Ridge from the air
See also
* Four Corners Monument
The Four Corners Monument marks the quadripoint in the Southwestern United States where the U.S. state, states of Arizona, Colorado, New Mexico, and Utah meet. It is the only point in the United States shared by four states, leading to the area ...
* Navajo Nation
The Navajo Nation (), also known as Navajoland, is an Indian reservation of Navajo people in the United States. It occupies portions of northeastern Arizona, northwestern New Mexico, and southeastern Utah. The seat of government is located in ...
** Navajo Indian Reservation
* Ute Mountain Ute Tribe
The Ute Mountain Ute Tribe (Ute dialect: Wʉgama Núuchi) is one of three federally recognized tribes of the Ute Nation, and are mostly descendants of the historic Weeminuche Band who moved to the Southern Ute reservation in 1897. Their reservati ...
** Ute Mountain Ute Indian Reservation
* List of regions of the United States
This is a list of some of the ways ''regions'' are defined in the United States. Many regions are defined in law or regulations by the federal government; others by shared culture and history, and others by economic factors.
Interstate regions ...
* Four Corners radio stations
* Canadian four corners
* Quadripoint
A quadripoint is a point on Earth where four distinct political territories meet. The territories can be of different types, such as national and provincial. In North America, several such places are commonly known as Four Corners (disambiguatio ...
* TAG Corner
* Trail of the Ancients National Scenic Byway, Four Corners, Colorado and Utah
* Trail of the Ancients Scenic Byway (New Mexico)
* List of tripoints of U.S. states
References
External links
{{Authority control
Colorado Plateau
Geography of Apache County, Arizona
Geography of Montezuma County, Colorado
Geography of San Juan County, New Mexico
Geography of San Juan County, Utah
Geography of the United States
Regions of the United States
Western United States