SOUTHWEST MESA. Southwest Mesa is near Table Top Mountain and Five Mile Creek seven miles southeast of McCamey in northwest Crockett County and extends across the Upton county line. The mesa is flanked by U.S. Highway 67, Farm Road 305, State Highway 349, and the Pecos River. The summit of Southwest Mesa rises to a height of 3,058 feet (at 31°04' N, 102°06' W). The mesa is composed of limestone and dolomite substrate with generally shallow and stony soils. Live oak, juniper, and some mesquite are found on it.