Sangre de Cristo Land Grant
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The Sangre de Cristo Land Grant in the San Luis Valley of southern Colorado and northern New Mexico consists of 1,000,000 acres (4,000 km2) of mostly arid land. It was awarded by the government of New Mexico to the Beaubien family in 1843. The land grant was originally settled by Hispanics from New Mexico. Since the incorporation of the area of the grant into the United States in 1848, legal disputes between the descendants of the Hispanic settlers and Anglo ranchers about ownership of and access to some of the land in the grant area have been frequent and continued into the 21st century.


New Mexico was part of an independent Mexico from 1821 to 1846. During this period, especially in the 1840s, the New Mexican government granted large tracts of land to prominent individuals. The grants were intended to expand the area inhabited by Mexican citizens. Grantees had the obligation of facilitating the settlement of the land in their grants. By expanding the area inhabited by Mexicans, the grants were intended to counter the influence and presence of the United States and Anglo-Americans which had been growing since the opening of the Santa Fe Trail in 1821. Settlements in the area of the grants also had the objective of protecting the heartland of New Mexico from raids by American Indian tribes, especially the Ute on New Mexico's northern border, the Navajo on the west, and the Apache on the south. New Mexico was at peace with the Comanche on its east even though the Comanche were launching large-scale raids southward into Mexico. Expansion northward from New Mexico to what would become the area of the Sangre de Cristo grant was prevented for more than 100 years by the Ute who inhabited the San Luis Valley of what would later become the state of Colorado.[1] [2]
The Sangre de Cristo Land Grant is in the San Luis Valley. It is approximately 55 miles (89 km) in north-south distance from near Blanca Peak, 4,374 m (14,350 ft) in elevation, in Colorado to northern New Mexico. The grant is about 30 miles (48 km) wide. The eastern border is the crest of the Culebra Range of the Sangre de Cristo Mountains which reach an elevation at Culebra Peak of 4,283 m (14,052 ft). The western border of the grant is the Rio Grande which at the border between New Mexico and Colorado has an elevation of 2,250 m (7,380 ft). The climate of the grant lands is arid and semi-arid with less than 10 in (250 mm) of precipitation in much of the San Luis Valley. The Sangre de Cristo mountains in the east have higher precipitation and the runoff from snow melt and rainfall provides most of the water for irrigation in the valleys of the three major tributaries of the Rio Grande in the grant. From north to south, they are Trinchera Creek, the Rio Culebra, and Costilla Creek.[3][4]