Valles Caldera Valles Caldera dates back to the prehistoric times: spear points dating to 11,000 years ago have been discovered. Several Native American tribes frequented the caldera, often seasonally for hunting and for obsidian, used for spear and arrow points. Obsidian from the caldera was traded by tribes across much of the Southwest. Eventually, Spanish and later Mexican settlers as well as the Navajo and other tribes came to the caldera seasonally for grazing with periodic clashes and raids. Later as the United States acquired New Mexico as part of the Treaty of Guadalupe Hidalgo in 1848, the caldera became the backdrop
Práxedis G. Guerrero Municipality 8,514 as of 2005. As of 2010, the town of Praxedis G. Guerrero had a population of 2,128. Other than the town of Praxedis G. Guerrero, the municipality had 85 localities, the largest of which (with 2010 population in parentheses) was: El Porvenir (1,253), classified as rural. Práxedis G. Guerrero has a very low population that rarely grows. In fact, much of the population, above all those of school age, leave for nearby Ciudad Juárez, due to the higher level of economic activity there. The municipality has 27 localities. The largest are: The climate is extremely arid, with very high