San Juan, Spanish for Saint John, may refer to:
Del Norte is a Statutory Town that is the county seat of Rio Grande County, Colorado, United States. The town's name is most commonly pronounced /ˈdɛl nɔɹt/. The town population was 1,458 at the 2020 United States Census.
The San Juan River is a major tributary of the Colorado River in the Southwestern United States, providing the chief drainage for the Four Corners region of Colorado, New Mexico, Utah, and Arizona. Originating as snowmelt in the San Juan Mountains of Colorado, it flows 383 miles (616 km) through the deserts of northern New Mexico and southeastern Utah to join the Colorado River at Glen Canyon.
The geography of the U.S. State of Colorado is diverse, encompassing both rugged mountainous terrain, vast plains, desert lands, desert canyons, and mesas. Colorado is a landlocked U.S. state. 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. Starting in 1868, official surveys demarcated the boundaries, deviating from the parallels and meridians in several places. Later surveys attempted to correct some of these mistakes but in 1925 the U.S. Supreme Court affirmed that the earlier demarcation was the official boundary. The borders of Colorado are now officially defined by 697 boundary markers connected by 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. This is the only place in the United States where four states meet: Colorado, New Mexico, Arizona, and Utah.
La Manga Pass, elevation 10,230 ft (3,120 m), is a mountain pass in the San Juan Mountains of Colorado. The pass is situated in Rio Grande National Forest.
Navajo Lake is a reservoir located in San Juan County and Rio Arriba County in northwestern New Mexico, in the southwestern United States. Portions of the reservoir extend into Archuleta County in southern Colorado. The lake is part of the Colorado River Storage Project, which here manages the upper reaches of the San Juan River, storing and releasing water that is used locally for irrigation, or ultimately reaching the Colorado River in Utah. Water is impounded in Navajo Lake by the earth- and rock-filled Navajo Dam, 3,800 feet (1,200 m) long and 400 feet (120 m) high, completed in 1962. The 15,600-acre (63 km2) lake is over 25 miles (40 km) long and lies at an elevation of up to 6,085 feet (1,855 m).
Navajo Dam is a dam on the San Juan River, a tributary of the Colorado River, in northwestern New Mexico in the United States. The 402-foot (123 m) high earthen dam is situated in the foothills of the San Juan Mountains about 44 miles (71 km) upstream and east of Farmington, New Mexico. It was built by the U.S. Bureau of Reclamation (Reclamation) in the 1960s to provide flood control, irrigation, domestic and industrial water supply, and storage for droughts. A small hydroelectric power plant was added in the 1980s.
La Plata River is a 70-mile-long (110 km) tributary to the San Juan River in La Plata County, Colorado, and San Juan County, New Mexico, in the United States. This small river heads at the western foot of Snow Storm Peak in the La Plata Mountains of southwestern Colorado, approximately 35 miles (56 km) north of the New Mexico state line. It flows in a southerly direction until it joins the San Juan at the western edge of the city of Farmington, New Mexico, about {[convert|19|mi|km}} south of the Colorado state line.
The Mancos Shale or Mancos Group is a Late Cretaceous geologic formation of the Western United States.
The Trail of the Ancients is a collection of National Scenic Byways located in the U.S. Four Corners states of Utah, Colorado, New Mexico, and Arizona. These byways comprise:
The Mancos River, formerly also El Rio de San Lazaro, is an 85.4-mile-long (137.4 km) northeast tributary of the San Juan River. It flows from the confluence of West Mancos River and East Mancos River near Mancos, Colorado and joins the San Juan near Four Corners Monument in New Mexico.
Navajo River is a 54-mile-long (87 km) tributary of the San Juan River. It flows from a source in the South San Juan Wilderness of Conejos County, Colorado southwest past Chromo, Colorado. The river dips into New Mexico, passing just north of Dulce before heading northwest to a confluence with the San Juan in Archuleta County, Colorado. A large portion of its water is diverted across the Continental Divide to the Rio Grande basin as part of the San Juan–Chama Project.
Rio San Antonio is a tributary of the Conejos River in northern New Mexico and southern Colorado. Via the Conejos River, it is part of the upper Rio Grande system. The river is used extensively for irrigation in its lower course through the southern San Luis Valley.
The Hinsdale Formation is a geologic formation exposed in southwestern Colorado and northern New Mexico. It has a radiometric age of 4.4 to 26.8 million years, corresponding to the Neogene period.
La Boca is an unincorporated community and census-designated place (CDP) in San Juan County, New Mexico, United States. It was first listed as a CDP prior to the 2020 census.
Los Pinos Pass is a mountain pass in Saguache County of south-central Colorado. It is located in the northern San Juan Mountains, a sub-range of the Rocky Mountains, and divides the waters of Cebolla Creek to the west and Los Pinos Creek to the east. Los Pinos Pass is traversed by Forest Road 788.
