REED PLATEAU. Reed Plateau is a two-mile-long mesa just south of Ranch Road 170 and southwest of Terlingua in southwestern Brewster County (at 29°19' N, 103°38' W). It is marked by gray cliffs of solid limestone from the Cretaceous period, some sixty-six to 114 million years ago. The average elevation is 3,000 feet above sea level. The area's shallow, stony soils support oak, juniper, and some mesquite. The mesa was named for Al Reed, a member of a pioneer Brewster County ranching family. Virginia Reed, the matriarch of the family, was said to be able to curse and chew tobacco as well as any man.