STRADDLEBUG MOUNTAIN. Straddlebug Mountain is in Green Valley thirty-three miles northwest of Terlingua in west central Brewster County (at 29°47' N, 103°42' W). At an elevation of 3,942 feet above sea level, it rises 360 feet above Terlingua Creek, one mile south. Its shallow, stony soils support live oak, piñon pine, juniper, and grasses. Two stories have been advanced to explain the mountain's name. The first holds that in June 1885 Sam Harmon and Syl Adams drove a herd of Straddlebug cattle into Green Valley and turned them loose there. The second story says that the mountain is named after the cattle brand used by the Collinson brothers, Scottish ranchers who settled in the area in 1892.