Santa Fe County, New Mexico in the context of "Albuquerque–Santa Fe–Los Alamos combined statistical area"

The Santa Fe National Forest is a protected national forest in northern New Mexico in the Southwestern United States. It was established in 1915 and covers 1,558,452 acres (6,306.83 km). Elevations range from 5,300 feet (1600 m) to 13,103 feet (4000 m) at the summit of Truchas Peak, located within the Pecos Wilderness. The Jemez, Coyote, and Cuba districts are located in the Jemez Mountains; the Pecos/Las Vegas district is located in the Sangre de Cristo Mountains; and the Española district is located in both mountain ranges. In descending order of land area the forest lies in parts of Rio Arriba, San Miguel, Sandoval, Santa Fe, Mora, and Los Alamos counties. Forest headquarters are located in the city of Santa Fe.

Santa Fe National Forest was established on July 1, 1915 by the U.S. Forest Service with the amalgamation of Jemez National Forest to the west of Santa Fe and Pecos National Forest to the east.The former division is remembered in the ranger districts, with the Jemez Ranger District to the west and the Pecos/Las Vegas district to the east. The western district is adjacent to the Valles Caldera National Preserve, which is administered by the National Park Service.

Española /ɛspənˈjoʊlə/ is a city primarily in Rio Arriba County, New Mexico, United States. A portion of the central and eastern section of the city is in Santa Fe County. Founded as a railroad village, it was named Española, with a post office established in 1881, and officially incorporated in 1925. It has been called the first capital city in the United States. As of the 2020 census, the population was at 10,526. Española is within the Albuquerque–Santa Fe–Los Alamos combined statistical area. The city is home to Northern New Mexico College.

Los Alamos County (English: "The Poplars" or "Cottonwoods"; Spanish: Condado de Los Álamos) is a county in the U.S. state of New Mexico. As of the 2020 census, the population was 19,419. The smallest county by area in the state, Los Alamos County was formed from parts of Sandoval and Santa Fe counties on June 10, 1949. The county has two census-designated places: Los Alamos and White Rock.

The land that eventually became Los Alamos County was administered exclusively by the U.S. federal government during and for a few years after the Manhattan Project.

The Battle of Glorieta Pass was fought March 26–28, 1862, in the northern New Mexico Territory, by Union and Confederate forces during the American Civil War. While not the largest battle of the New Mexico campaign, the Battle of Glorieta Pass ended the Confederacy's efforts to capture the territory and other parts of the western United States.

The battle took place at the eponymous mountain pass in the Sangre de Cristo Mountains, in what is now Santa Fe County, New Mexico. Confederate forces sought to break the Union's possession of the West along the base of the Rocky Mountains, with the ultimate aim of controlling strategically valuable mines, railroads, and cities throughout the region. The invasion was the westernmost military operation of the war, and the South's only real attempt to conquer and occupy Union territory.