TRES CUEVAS MOUNTAIN. Tres Cuevas Mountain is four miles northwest of Terlingua in southwestern Brewster County (at 29°19' N, 103°43' W). At an elevation of 3,635 feet above sea level, it rises some 1,130 feet above Farm Road 170, two miles south. Shallow, stony soils on the mountain support oak, juniper, and mesquite. The name means "Three Caves" in Spanish, referring to the three openings on the mountain's northwestern face. Tres Cuevas Mountain was the site of the Lone Star and Mariposa mines, among the most important mercury producers in the Terlingua Mining District in the 1890s and early twentieth century.
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"Tres Cuevas Mountain,"
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