MUSTANG CREEK (Grayson County). Mustang Creek rises in southwestern Grayson County three miles east of the Grayson-Denton county line (at 33°26' N, 96°49' W). Intermittent in its upper reaches, the creek runs southwesterly for thirteen miles to its mouth on Little Elm Creek in Denton County (at 33°17' N, 96°54' W). Its course crosses the Blackland Prairies and the Cross Timbers areas of north central Texas, which are characterized by flat to rolling prairie with some local shallow depressions and loamy, cracking, clayey soils. Vegetation consists primarily of mesquite and grasses combined with stands of post oak woods. Much of the area has been converted to cropland. A settlement named Mustang, one of the pioneer settlements of Denton County, was established on the creek in the 1850s.