PEÑA CREEK. Peña Creek rises twelve miles southwest of Carrizo Springs in west central Dimmit County (at 28°27'N,100°01 'W) and flows northeast for twenty-one miles before emptying into Turkey Creek a mile southwest of Crystal City in southern Zavala County (at 28°40' N, 99°51' W). The creek rises in flat to rolling land and descends to flat terrain with locally shallow depressions in its lowest reaches. Mesquite, grasses, and cacti grow in the upper reaches and water-tolerant hardwoods and grasses in the lower. Upstream the ground is dark clay, and downstream clay and sandy loams predominate.