The San Luis Valley is a region in south-central Colorado with a small portion overlapping into New Mexico. The valley is approximately 122 miles (196 km) long and 74 miles (119 km) wide, extending from the Continental Divide on the northwest rim into New Mexico on the south. It contains 6 counties and portions of 3 others. It is an extensive high-elevation depositional basin of approximately 8,000 square miles (21,000 km2) with an average elevation of 7,664 feet (2,336 m) above sea level. The valley is a section of the Rio Grande Rift and is drained to the south by the Rio Grande, which rises in the San Juan Mountains to the west of the valley and flows south into New Mexico. The San Luis Valley has a cold desert climate but has substantial water resources from the Rio Grande and groundwater.
The Sangre de Cristo Range is a mountain range in the Rocky Mountains in southern Colorado in the United States, running north and south along the east side of the Rio Grande Rift. The mountains extend southeast from Poncha Pass for about 75 mi (121 km) through south-central Colorado to La Veta Pass, approximately 20 mi (32 km) west of Walsenburg, and form a high ridge separating the San Luis Valley on the west from the watershed of the Arkansas River on the east. The Sangre de Cristo Range rises over 7,000 ft (2,100 m) above the valleys and plains to the west and northeast.
Great Sand Dunes National Park and Preserve is a national park of the United States that conserves an area of large sand dunes on the eastern edge of the San Luis Valley, and an adjacent national preserve in the Sangre de Cristo Range, in south-central Colorado. The park was originally designated Great Sand Dunes National Monument on March 17, 1932, by President Herbert Hoover. The original boundaries protected an area of 35,528 acres. A boundary change and redesignation as a national park and preserve was authorized on November 22, 2000, and then established on September 24, 2004. The park encompasses 107,342 acres while the preserve protects an additional 41,686 acres for a total of 149,028 acres. The recreational visitor total was 527,546 in 2019.
The Sangre de Cristo Mountains are the southernmost subrange of the Rocky Mountains. They are located in southern Colorado and northern New Mexico in the United States. The mountains run from Poncha Pass in South-Central Colorado, trending southeast and south, ending at Glorieta Pass, southeast of Santa Fe, New Mexico. The mountains contain a number of fourteen thousand foot peaks in the Colorado portion, as well as several peaks in New Mexico which are over thirteen thousand feet.
Black Mesa is a mesa located in an area covering parts of the U.S. states of Colorado, New Mexico, and Oklahoma. It extends from Mesa de Maya, Colorado southeasterly 28 miles (45 km) crossing into the northeast corner of New Mexico, and ending in the Oklahoma panhandle along the north bank of the Cimarron River at its confluence with the North Carrizo Creek near Kenton. Its highest elevation is 5,705 feet (1,739 m) in Colorado. The highest point of Black Mesa within New Mexico is 5,239 feet (1,597 m). In northwestern Cimarron County, Oklahoma, Black Mesa reaches 4,973 feet (1,516 m), the highest point in the state of Oklahoma. The plateau that formed at the top of the mesa has been known as a "geological wonder" of North America. There is abundant wildlife in this shortgrass prairie environment, including mountain lions, butterflies, and the Texas horned lizard.
Ratón Pass is a 7,834 ft (2,388 m) elevation mountain pass on the Colorado–New Mexico border in the western United States. It is located on the eastern side of the Sangre de Cristo Mountains between Trinidad, Colorado and Raton, New Mexico, approximately 180 miles (290 km) northeast of Santa Fe. Ratón is Spanish for "mouse". The pass crosses the line of volcanic mesas that extends east from the Sangre de Cristo Mountains along the state line, and furnishes the most direct land route between the valley of the Arkansas River to the north and the upper valley of the Canadian River, leading toward Santa Fe, to the south. The pass now carries Interstate 25 and railroad tracks.
Johnson Mesa is a prominent mesa in Colfax County in northeastern New Mexico just south of the Colorado border. The city of Raton is on the west and the community of Folsom on the east.
Baldy Mountain, Baldy Peak, Mount Baldy, or Old Baldy is the highest peak in the Cimarron Range, a subrange of the Sangre de Cristo Mountains of New Mexico. It is located in Colfax County, about 6 miles (10 km) northeast of Eagle Nest. It rises abruptly, with 3,640 feet (1,110 m) of vertical relief, from the Moreno Valley to the west and has a total elevation of 12,441 feet (3,792 m).
San Isabel National Forest is located in central Colorado. The forest contains 19 of the state's 53 fourteeners, peaks over 14,000 feet (4,267 m) high, including Mount Elbert, the highest point in Colorado.
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.
The Pecos Wilderness is a protected wilderness area within the Santa Fe National Forest and Carson National Forest. The Pecos Wilderness lies within the Camino Real Ranger District of the Carson National Forest, and the Pecos Ranger District and Espanola Ranger District of the Santa Fe National Forest. The Pecos Wilderness includes the southernmost extension of the Rocky Mountains in the sub-range of the Sangre de Cristo Mountains of north central New Mexico. One trail head for the wilderness is only 15 miles by road from Santa Fe, the state capital. Covering an area of 223,667 acres (90,515 ha)(350 sq mi) it is the second largest wilderness in the state after the Gila Wilderness. An area of fewer than 200,000 acres (81,000 ha) was given wilderness protection by Congress in 1964. Congress protected an additional 55,000 acres (22,000 ha) in 1980. The Wilderness boasts one of the highest concentrations of peaks exceeding 12,000 feet (3,700 m) in elevation in New Mexico, including Santa Fe Baldy, 12,622 feet (3,847 m), the highest point in Santa Fe County, and South Truchas Peak, 13,102 feet (3,993 m), the second highest peak in the state.
The Purgatoire River, also known as the Purgatory and Picketwire River, is in southeastern Colorado, United States. The river originates in the high mountains of the Culebra Range. Several tributaries merge near Weston in Las Animas County and the river flows east-northeastward 196 miles (315 km) to a confluence with the Arkansas River near Las Animas in Bent County, Colorado. The Purgatoire River drains an area of 3,449 square miles (8,930 km2), mostly in Colorado but a small percentage of the watershed is in New Mexico. The Purgatoire River watershed is lightly populated. Population has been declining since 1920 as former coal mining and agricultural communities have become ghost towns.
Vermejo Park Ranch, Vermejo Ranch, or Vermejo, is a 550,000-acre (220,000 ha) nature reserve and guest ranch in northeastern New Mexico and southern Colorado. Ted Turner Reserves, the luxury hospitality company founded by Ted Turner, includes conservation research and ecosystem restoration along with guest operations. The reserve, which stretches from the Great Plains at an elevation of 5,867 ft (1,788 m) to the summit of the Sangre de Cristo Mountains, reaches an elevation of 12,931 ft (3,941 m). The ranch produces significant quantities of coalbed methane, a type of natural gas.
Sugarite Canyon State Park is a state park of New Mexico, United States, featuring a historic early-20th century coal-mining camp and natural scenery at the border of the Rocky Mountains and the Great Plains. The park is located on the Colorado–New Mexico state line 6 miles (9.7 km) in Colfax County, New Mexico, northeast of Raton.
Coyote Creek State Park is a state park of New Mexico, United States, preserving a riparian canyon in the Sangre de Cristo Mountains. The park is located 17 miles (27 km) north of Mora. Coyote Creek is the most densely stocked trout stream in New Mexico.
Philmont Scout Ranch is located in the Sangre de Cristo Mountains of the Rocky Mountains of New Mexico. Philmont is about 12 miles (19 km) across at its widest point, and about 30 miles (48 km) long. The southern part of the ranch is mostly grasslands/prairie, while the north is rocky and rugged, but a small part of the eastern area is prairie.
Fishers Peak is a spur of the Ratón Mesa, which reaches the highest elevation of the collective mesas of the Ratón formation commencing at the Sangre de Cristo Mountains, a subset of the Rocky Mountains, from the west, 90 miles eastward to the Oklahoma border. Ratón Mesas include Black Mesa, Johnson Mesa, and Mesa de Maya. The prominent 9,633-foot (2,936 m) mesa is located 5.5 miles (8.8 km) south by east of the Town of Trinidad in Las Animas County, Colorado, United States. Fishers Peak is higher than any point in the United States east of its longitude.
The Mesa de Maya is a prominent volcanic tableland rising 500 feet (150 m) to 1,200 feet (370 m) above the Great Plains in southeastern Colorado. A narrow finger of the mesa extends eastward through the northeastern corner of New Mexico and a few miles into Oklahoma where it is known as the Black Mesa. The elevation of the Mesa de Maya ranges from 4,800 feet (1,500 m) at its easternmost extension to 6,902 feet (2,104 m) in the west.
Fishers Peak State Park is a Colorado state park in Las Animas County, Colorado, just south of Trinidad. Trinidad Lake State Park is nearby. The park opened on October 30, 2020, and is still being developed.
