El Camino del Diablo (
Spanish
Spanish might refer to:
* Items from or related to Spain:
** Spaniards are a nation and ethnic group indigenous to Spain
**Spanish language, spoken in Spain and many Latin American countries
**Spanish cuisine
Other places
* Spanish, Ontario, Ca ...
, meaning "The Devil's Highway"), also known as El Camino del Muerto, Sonora Trail, Sonoyta-Yuma Trail, Yuma-Caborca Trail, and Old Yuma Trail,
is a historic road that passes through some of the most remote and inhospitable terrain of the
Sonoran Desert
The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Arizon ...
in
Pima County
Pima County ( ) is a county in the south central region of the U.S. state of Arizona. As of the 2020 census, the population was 1,043,433, making it Arizona's second-most populous county. The county seat is Tucson, where most of the populatio ...
and
Yuma County,
Arizona
Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a U.S. state, state in the Southwestern United States. It is the list of U.S. states and territories by area, 6th largest and the list of U.S. states and territories by population, 14 ...
. The name refers to the harsh, unforgiving conditions on the trail.
In use for thousands of years, El Camino del Diablo began as a series of footpaths used by desert-dwelling
Native Americans. From the 16th to the 19th centuries, the road was used extensively by
conquistadores, explorers, missionaries, settlers, miners, and cartographers. Use of the trail declined sharply after the
Southern Pacific Railroad
The Southern Pacific (or Espee from the railroad initials- SP) was an American Railroad classes#Class I, Class I Rail transport, railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was ...
reached
Yuma in 1877.
In recognition of its historic significance, El Camino del Diablo was listed on the
National Register of Historic Places
The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artist ...
in 1978.
It has also been designated a
Back Country Byway by the
Bureau of Land Management.
Original route

The southern terminus of the original route was located in
Caborca
Caborca is the municipal seat of the Caborca Municipality in the Mexican state of Sonora. The city has a population of 67,604, while the municipal population was 89,122 as of 2020. Municipal boundaries are with Pima County, Arizona, in the Unit ...
, in what is today the Mexican state of
Sonora
Sonora (), officially Estado Libre y Soberano de Sonora ( en, Free and Sovereign State of Sonora), is one of the 31 states which, along with Mexico City, comprise the Federal Entities of Mexico. The state is divided into 72 municipalities; the ...
. From Caborca, the route passed through
Sonoyta, then
Quitobaquito Springs
Quitobaquito Springs are springs in Organ Pipe Cactus National Monument in Pima County, Arizona. The name is of Tohono O'odham origin meaning 'house ring spring'. The area has been populated for at least 16,000 years. It lies at an elevation of ...
, then through the lava fields of the
Sierra Pinacate, then through the
Tule Desert and the
Tule Mountains. After passing just south of
Tordillo Mountain, the route ran past the rain-fed
tinajas of the
Tinajas Altas before crossing the
Tinajas Altas Mountains
The Tinajas Altas Mountains ( O'odham: Uʼuva:k or Uʼuv Oopad) are an extremely arid northwest–southeast trending mountain range in southern Yuma County, Arizona, approximately 35 mi southeast of Yuma, Arizona. The southern end of the rang ...
through the nearby
Tinajas Altas Pass
Tinajas Altas Pass is a gap in the Tinajas Altas Mountains in Yuma County, Arizona. Its highest elevation is at .
History
Tinajas Altas Pass was the route that El Camino del Diablo
El Camino del Diablo (Spanish, meaning "The Devil's Highwa ...
. From there, the route continued to the northwest, following the western border of the
Gila Mountains before finally reaching the
Colorado River
The Colorado River ( es, Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. The river drains an expansive, arid watershed that encompasses parts of seven U.S. s ...
at
Yuma Crossing
Yuma Crossing is a site in Arizona and California that is significant for its association with transportation and communication across the Colorado River. It connected New Spain and Las Californias in the Spanish Colonial period in and also durin ...
. From Yuma Crossing, travelers could cross the
Colorado Desert
California's Colorado Desert is a part of the larger Sonoran Desert. It encompasses approximately , including the heavily irrigated Coachella and Imperial valleys. It is home to many unique flora and fauna.
Geography and geology
The Colorado De ...
to reach the
Spanish colonies of California.
History of the trail

El Camino del Diablo is believed to follow Native American footpaths dating to thousands of years ago. In 1540, accompanied by native guides, Captain
Melchor Díaz
Melchor Díaz (or Melchior) (died January, 1541) was an early Spain, Spanish explorer of western North America who "was a hard worker and skillful organizer and leader. He inspired confidence in his companions and followers, and always maintained ...
led a detachment of the
Coronado Expedition through this vicinity en route to
the Californias
The Californias ( Spanish: ''Las Californias''), occasionally known as The Three Californias or Two Californias, are a region of North America spanning the United States and Mexico, consisting of the U.S. state of California and the Mexican ...
. The next Europeans known to have transited the route were in the party of
Jesuit priest
Eusebio Francisco Kino, Commander Juan Matheo Mange, and Father Adamo Gilig, who – along with attendants and Native American guides who knew the location of vital water sources needed along the route – first made the crossing in February 1699.
The trail offered a shorter route than sailing around
Baja California
Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
, while avoiding most of the more hostile Native American tribes.
The route was used by the expeditions to
Alta California
Alta California ('Upper California'), also known as ('New California') among other names, was a province of New Spain, formally established in 1804. Along with the Baja California peninsula, it had previously comprised the province of , but ...
of
Juan Bautista de Anza
Juan Bautista de Anza Bezerra Nieto (July 6 or 7, 1736 – December 19, 1788) was an expeditionary leader, military officer, and politician primarily in California and New Mexico under the Spanish Empire. He is credited as one of the founding ...
of the 1770s.
[ However, the 1781 uprising of the ]Quechan
The Quechan (or Yuma) ( Quechan: ''Kwatsáan'' 'those who descended') are a Native American tribe who live on the Fort Yuma Indian Reservation on the lower Colorado River in Arizona and California just north of the Mexican border. Despite th ...
tribe at Yuma Crossing on the Colorado River prevented travelers from reaching the Californias via the trail. Although Lieutenant Colonel Pedro Fages
Pedro Fages (1734–1794) was a Spanish soldier, explorer, first Lieutenant Governor of the Californias under Gaspar de Portolá. Fages claimed the governorship after Portolá's death, acting as governor in opposition to the official governo ...
managed to rescue captured Spanish survivors of the uprising in December of that year, El Camino del Diablo largely fell into disuse until 1848–1849, when the California Gold Rush brought many new migrants from Mexico
Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guate ...
, especially from Sonora to the goldfields of California.[ Afterward, the trail was used by both ]United States and Mexican Boundary Survey
The United States and Mexican Boundary Survey (1848–1855) determined the border between the United States and Mexico as defined in the Treaty of Guadalupe Hidalgo, which had ended the Mexican–American War. The results of the survey were publis ...
teams, mapping and cataloging the land purchased in the 1853 Gadsden Purchase
The Gadsden Purchase ( es, region=MX, la Venta de La Mesilla "The Sale of La Mesilla") is a region of present-day southern Arizona and southwestern New Mexico that the United States acquired from Mexico by the Treaty of Mesilla, which took effe ...
. A second wave of Sonoran miners used the trail in the 1860s, when placer gold
Placer mining () is the mining of stream bed (alluvial) deposits for minerals. This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunneling equipment.
Placer mining is frequently used for p ...
was discovered along the Colorado River.
Many of these migrants, not used to travel in the desert, would die from thirst and heat exhaustion en route. As a later traveler noted, "frequent graves and bleaching skulls of animals are painful reminders of unfortunate travelers who died from thirst on the road." The most difficult stretch of the trail was the stretch from Sonoyta, Mexico, to what is now Yuma, Arizona
Yuma ( coc, Yuum) is a city in and the county seat of Yuma County, Arizona, United States. The city's population was 93,064 at the 2010 census, up from the 2000 census population of 77,515.
Yuma is the principal city of the Yuma, Arizona, M ...
. An estimated 400 – 2000 travelers have lost their lives on the trail,
primarily from dehydration
In physiology, dehydration is a lack of total body water, with an accompanying disruption of metabolic processes. It occurs when free water loss exceeds free water intake, usually due to exercise, disease, or high environmental temperature. Mi ...
, heat stroke
Heat stroke or heatstroke, also known as sun stroke, is a severe heat illness that results in a body temperature greater than , along with red skin, headache, dizziness, and confusion. Sweating is generally present in exertional heatstroke, ...
, and sunburn
Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun. Common symptoms in humans and animals include: red or reddish skin that i ...
, but also from hyperthermia
Hyperthermia, also known simply as overheating, is a condition in which an individual's body temperature is elevated beyond normal due to failed thermoregulation. The person's body produces or absorbs more heat than it dissipates. When extreme ...
. In summer, temperatures here soar to , and people require of water a day just to survive. Most of the graves line the last of the trail to Yuma; by one count, there are 65 graves near Tinajas Altas.[El Camino del Diablo]
at Cabeza Prieta National Wildlife Refuge
Cabeza Prieta National Wildlife Refuge (CPNWR) is located in southwestern Arizona in the United States, along of the Mexico–United States border. It is bordered to the north and to the west by the Barry M. Goldwater Air Force Range, to the s ...
Use of the trail declined sharply after the Southern Pacific Railroad
The Southern Pacific (or Espee from the railroad initials- SP) was an American Railroad classes#Class I, Class I Rail transport, railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was ...
reached Yuma in 1870. While prospectors and transient visitors continued to visit the area, El Camino del Diablo never regained its status as a major migration route. Occasionally the route was used by cartographers and boundary survey parties, who documented numerous remains of both humans and domesticated animals.
In recognition of its historic significance, El Camino del Diablo was listed on the National Register of Historic Places
The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artist ...
in 1978. It can still be transited by visitors to the Cabeza Prieta National Wildlife Refuge
Cabeza Prieta National Wildlife Refuge (CPNWR) is located in southwestern Arizona in the United States, along of the Mexico–United States border. It is bordered to the north and to the west by the Barry M. Goldwater Air Force Range, to the s ...
, established in 1939 to protect desert wildlife. With the exception of one United States Border Patrol
The United States Border Patrol (USBP) is a Federal law enforcement in the United States, federal law enforcement agency under the United States' U.S. Customs and Border Protection, Customs and Border Protection and is responsible for securing ...
station ( Camp Grip), the section of the original trail between Las Playas and Tinajas Altas remains virtually unchanged.[
]
Tinajas Altas
The historic campground at '' Tinajas Altas'' ("high tanks") features nine cup-like pools ('' tinajas'') perched one above the other on a steep granite slope, that are replenished solely by rainwater. When full, these ''tinajas'' may hold up to , but due to the lack of rainfall and arid atmosphere, one or more are frequently empty. In the days before motor vehicle transport, some travelers perished after finding one or more pools dry. During the 1891-1896 U.S. Boundary Survey expedition, the surveying party related the story of three dead prospectors found just above the empty first tank. The men's fingers were worn raw from climbing the rock to the second tank, which held water, and it was apparent the men had died just yards from their salvation.[Gaillard, p. 603]
El Camino del Diablo today
Today, the Camino del Diablo remains a dirt road
A dirt road or track is a type of unpaved road not paved with asphalt, concrete, brick, or stone; made from the native material of the land surface through which it passes, known to highway engineers as subgrade material. Dirt roads are suitabl ...
, suitable for four-wheel drive
Four-wheel drive, also called 4×4 ("four by four") or 4WD, refers to a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer ca ...
and high- clearance vehicles carrying extra water and emergency equipment. No emergency or tow services are available, and visitors use the trail at their own risk.
South of the Mexico–United States border
The Mexico–United States border ( es, frontera Estados Unidos–México) is an international border separating Mexico and the United States, extending from the Pacific Ocean in the west to the Gulf of Mexico in the east. The border trav ...
, the original sections of the Camino del Diablo have largely disappeared. In its place, the Mexican government has constructed a paved highway, Mexican Federal Highway 2
Federal Highway 2 ( es, Carretera Federal 2, Fed. 2) is a free part of the Mexican federal highway corridors () that runs along the U.S. border. The highway is in two separate improved segments, starting in the west at Tijuana, Baja Californ ...
, which roughly parallels the border for .
The current route begins southwest of Ajo, Arizona
Ajo ( ) is an unincorporated community in Pima County, Arizona, United States. It is the closest community to Organ Pipe Cactus National Monument. The population was 3,304 at the 2010 census. Ajo is located on State Route 85 just from t ...
, at the boundary between Organ Pipe Cactus National Monument
Organ Pipe Cactus National Monument is a U.S. national monument and UNESCO biosphere reserve located in extreme southern Arizona that shares a border with the Mexican state of Sonora. The park is the only place in the United States where the s ...
and Cabeza Prieta National Wildlife Refuge
Cabeza Prieta National Wildlife Refuge (CPNWR) is located in southwestern Arizona in the United States, along of the Mexico–United States border. It is bordered to the north and to the west by the Barry M. Goldwater Air Force Range, to the s ...
. From there, it continues west past San Cristobal Wash, following the northern edge of the Agua Dulce Mountains to reach Papago Well. From there, the road passes Camp Grip, then runs south of the Sierra Pinta as it passes through the Pinta Sand Dunes and then the Pinacate Volcanic Field. From there, the road passes through the Tule Desert and Tule Mountains, and into Tule Tank Canyon to reach Tule Well, where the road intersects with Christmas Pass Road. The road then passes through the Lechuguilla Desert, just south of Tordillo Mountain, before finally reaching the Tinajas Altas Mountains
The Tinajas Altas Mountains ( O'odham: Uʼuva:k or Uʼuv Oopad) are an extremely arid northwest–southeast trending mountain range in southern Yuma County, Arizona, approximately 35 mi southeast of Yuma, Arizona. The southern end of the rang ...
. At Tinajas Altas, the road forks, and the traveler can take a shorter route which heads north through the Barry M. Goldwater Air Force Range
The Barry M. Goldwater Air Force Range or Barry M. Goldwater Range (BMGR), formerly known as Luke Air Force Range, is a bombing range in the U.S. state of Arizona, between the Mexico–United States border and Interstate 8 straddling the Cabeza ...
, passing east of Raven Butte and Cipriano Pass and following the eastern border of the Gila Mountains, before finally reaching Interstate 8
Interstate 8 (I-8) is an Interstate Highway in the southwestern United States. It runs from the southern edge of Mission Bay at Sunset Cliffs Boulevard in San Diego, California, almost at the Pacific Ocean, to the junction with I-10, jus ...
and the Gila River
The Gila River (; O'odham ima Keli Akimel or simply Akimel, Quechan: Haa Siʼil, Maricopa language: Xiil) is a tributary of the Colorado River flowing through New Mexico and Arizona in the United States. The river drains an arid watershed of ...
at Wellton, Arizona
Wellton is a town in Yuma County, Arizona, United States. According to the 2010 census, the population of the town is 2,882. It is part of the Yuma Metropolitan Statistical Area.
Geography
Wellton is located at (32.671436, -114.140972).
Ac ...
. Alternatively, the traveler may choose a longer route that more closely follows the original route. This route crosses the Tinajas Altas Mountains and continues in a northwest direction, passing west of Raven Butte and Cipriano Pass. It then follows the western border of the Gila Mountains, passing by the abandoned Fortuna Mine, before finally reaching the small community of Fortuna Foothills, Arizona.
The trail follows the Mexico–United States border very closely for most of its length. To transit the entire trail, a permit is required from the Cabeza Prieta National Wildlife Refuge office in Ajo.[
]
See also
*
*
References
Further reading
*
*
*
External links
El Camino del Diablo Back Country Byway
at the Bureau of Land Management
Trail guide and photo gallery
at Desert USA
{{Authority control
Roads on the National Register of Historic Places in Arizona
History of Yuma County, Arizona
Sonoran Desert
Gran Desierto de Altar
Mexico–United States border
National Register of Historic Places in Yuma County, Arizona
Transportation in Yuma County, Arizona
Transportation in Pima County, Arizona