Los Alamos, New Mexico, United States

🇺🇸 Los Alamos is a town in Los Alamos County, New Mexico, United States, that is recognised as the development and creation place of the atomic bomb—the primary objective of the Manhattan Project by Los Alamos National Laboratory during World War II. The town is located on four mesas of the Pajarito Plateau. It is the county seat and one of two population centres in the county known as places; the other is White Rock.

Toponym Los Alamos is a Spanish place name that typically refers to poplar or cottonwood trees. Alternatively, Los Alamos could refer to the large groves of aspen trees (alamo temblon) that intersperse the coniferous forest on the mountainsides above the townsite, where they are distinctly visible during the autumn months due to their spectacular autumn colors.

History The ruins of permanent Puebloan settlements, such as those located in nearby Bandelier National Monument and Tsankawi, and numerous other sites such as cliff dwellings indicate that the area has been inhabited during various eras since around 1150 AD. The first settlers on the plateau are thought to be Keres speaking Native Americans around the 10th century. Around 1300, Tewa settlers immigrated from the Four Corners Region and built large cities but were driven out within 50 years by Navajo and Apache raids and by drought.

In the late 19th century, homesteaders utilized the land for ranching. Most homesteaders built simple log cabins that they only lived in during warm weather to feed livestock. Many of the homesteaders later moved down to the warmer Rio Grande Valley. In 1917, homesteader Harold H. Brook sold part of his land and buildings to Ashley Pond II, a businessman from Detroit who founded the Los Alamos Ranch School. The area was used to teach young men basic ranching and other outdoor survival skills.

In 1943, during World War II, the United States Department of War exercised eminent domain over the Ranch School and all remaining homesteads in the area so that the relatively isolated location could be used for the secretive Manhattan Project, which ultimately developed the world's first nuclear weapons. Facilities for research and development were quickly built and scientists and engineers from all over the world were assigned to the project; however, all information about the town and project was held secret from the public. Los Alamos was referred to under the code name "Site Y" by military personnel, and was known only as "The Hill" by many in nearby Santa Fe.

Los Alamos was originally built as a closed city accessible from the outside world through only two gates. The specific location of the project was a tightly guarded secret. All employees recruited to work at the Los Alamos site were given a memorandum instructing them to travel to Santa Fe and report to the U.S. Army Corps of Engineers office at 109 East Palace Avenue. At that location, Dorothy McKibbin provided newcomers with the necessary documentation to get through security checkpoints (initially, letters signed by J. Robert Oppenheimer himself, and later, security passes), along with specific directions to the Hill. The project was further concealed by designating its mailing address as PO Box 1663, Santa Fe, N.M. All incoming truckloads were falsely labeled as common items in order to conceal the true nature of their contents, and any outbound correspondence by those working and living in Los Alamos was censored by military officials.

Not until after the bombing of Hiroshima was information about the Manhattan Project released to the public; being announced by the White House at 11 am on 6 August (when Nichols was able to tell his wife what he had been doing). A set of press releases were given out over three days.

In the years after World War II, the laboratory was formally established as a research government facility under the civilian control of the U.S. Atomic Energy Commission, and is now known as Los Alamos National Laboratory. In 1957, the AEC pulled back the security perimeter to the laboratory itself and opened up the town for visits by the general public. The first visitor to enter the town that year without a permit from the federal government was New Mexico Governor Edwin L. Mechem. The AEC was later succeeded by the U.S. Department of Energy.

Geography Los Alamos is located in northern New Mexico between the Rio Grande and the eastern rim of the Valles Caldera on the Pajarito Plateau, approximately 35 mi (56 km) to the north-west of Santa Fe. The elevation at the post office is 7,320 feet (2,230 m) and total land area is 11.14 square miles (28.9 km²).

The Los Alamos Townsite and White Rock are located on flat mesa tops separated by steep canyons. This location was chosen for its relative inaccessibility to help protect the secret activities of the Manhattan Project.

The town of Los Alamos was built on four mesas—Barranca Mesa, North Mesa, Los Alamos Mesa and South Mesa—along with the connecting communities at the base of the mountain. Los Alamos National Laboratory occupies half of South Mesa, Two Mile Mesa, Frijoles Mesa, Mesita de Buey and several nearby areas in the region (in the valleys and at the base of the mountain). White Rock lies at the top of White Rock Canyon.

Much of Los Alamos County is within the Española Ranger District of the Santa Fe National Forest.

Economy Los Alamos is the fifth-fastest-growing city in New Mexico, after Albuquerque, Rio Rancho, Las Cruces, and Ruidoso.

Income The median household income in Los Alamos is $98,458, and per capita income is $54,067. Income is significantly higher than the rest of New Mexico. Los Alamos has the highest millionaire concentration of any US city, with 12.4 percent of households having at least $1 million in assets. This is a result of chemists, engineers, and physicists working at LANL since the Manhattan Project. Only 6.6% of people are below the poverty line; half the rate of the United States, and one-third the rate of New Mexico. As of January 2015, there were zero homeless individuals.

Families and housing There are 5,249 households and an average household size of 2.23 people. There are 5,863 housing units, and the median value of owner-occupied housing units is $281,500. Median gross rent is $921.

31.4% of households have children under the age of 18 living with them, 56.4% are married couples living together, 6.5% have a female householder with no husband present, and 34.0% are non-families. 29.8% of all households are made up of individuals, and 7.6% have someone living alone who is 65 years of age or older.

Principal employers Los Alamos National Laboratory is the area's largest employer with approximately 10,500 employees, and is foundational to the economy of Los Alamos, with an annual budget of about $2.45 billion. Approximately 40% of the laboratory's employees live in Los Alamos, while the remainder commute from Santa Fe, Española, Taos, and Albuquerque. About 66% of the people who work in the national laboratories commute daily to the lab; some take the Atomic City Transit, Rail Runner Express, use the Park and Ride, or carpool with other employees.

Other major employers in Los Alamos include Smith's Food and Drug, Los Alamos National Bank, Los Alamos Medical Center, National Security Technologies, Los Alamos County, Los Alamos Public Schools, and Del Norte Credit Union.

Wildlife and vegetation Los Alamos' geographical location causes its wildlife and vegetation to be diverse compared to surrounding areas in the state. "The variation in elevation creates precipitation and temperature gradients that support a wide diversity of plant communities…" There are six different plant communities within the county; each is home to unique flora and fauna. Ponderosa pine trees are the most common trees at the elevation of Los Alamos (7,000 and 8,000 feet (2,100 and 2,400 m)). Common shrubs in the area include sagebrush, Gambel oak, and wild rose.

Black bears (brown-color variation), elk, mule deer, bobcats, gray foxes, skunks and chipmunks are examples of mammals living in the area. "Over 200 species of birds have been reported" in the Pajarito Ornithological Survey conducted by LANL. Among these are broad-tailed hummingbirds, hairy woodpeckers, zone-tailed hawks, common ravens, western bluebirds, and great horned owls.

Sports and recreation The geography of Los Alamos lends itself to several sports and recreational activities. There is an extensive system of trails within the canyons and into the mountains above the town, catering to all skill levels of running, hiking and mountain biking. The Aquatic Center is an indoor, Olympic-length public swimming pool (soon to be joined by a lazy river), and a public 18-hole golf course (par 72, 6500 yards) has existed since 1947.

Winter sports include skiing at the community-owned Pajarito Mountain Ski Area on 10,440 ft. Pajarito Mountain between November and April. The County maintains New Mexico's only refrigerated, NHL regulation, outdoor ice skating rink on the sun-shaded floor of Los Alamos Canyon, almost beneath the Omega Bridge. Snowshoeing and cross-country skiing are possible at Valles Caldera National Preserve and other locations, weather permitting.

Los Alamos is host to several sporting events: • Tour de Los Alamos (road cycling race) • Run the Caldera Marathon • Pajarito Punishment (mountain-biking race) • Los Alamos Triathlon (Los Alamos Junior Triathlon) • Jemez Mountain Trail Run

On November 10, 2015, the National Park Service and the U.S. Department of Energy announced the establishment of Manhattan Project National Historical Park in Los Alamos, along with units in Hanford, Washington and Oak Ridge, Tennessee.