Colorado, “the Centennial State,” was the thirty-eighth state to enter the Union on August 1, 1876. Its diverse geography encompasses 104,094 square miles of the American West and includes swathes of the Great Plains, southern Rocky Mountains, and the…

Conejos County covers 1,287 square miles of the southern San Luis Valley and eastern San Juan Mountains in south central Colorado. It is bordered by Archuleta County to the west, Rio Grande and Alamosa Counties to the north, Costilla County to the east,…

One of the most ecologically and culturally significant trees in Colorado, the plains cottonwood (Populus deltoides monilifera) thrives near rivers and riparian areas throughout the state. It is one of the only tree species to grow on Colorado’s Great…

The oldest continuously occupied town in Colorado, San Luis sits along Culebra Creek, just west of the Sangre de Cristo Mountains in the southeast portion of the San Luis Valley. In April 1851, Hispanos from Taos, New Mexico, founded San Luis on the…

There is no shortage of labels used to identify members of the population that share a Spanish language heritage and/or whose ancestry is from one or more Spanish-speaking or Latin American countries. These many labels include but are not limited to …

Signed on February 2, 1848, the Treaty of Guadalupe Hidalgo ended the Mexican-American War (1846–48). In the treaty, the Republic of Mexico agreed to cede 55 percent of its territory, some 525,000 square miles, to the United States. This land eventually…