Cap Rock, TexasCap Rock is an unincorporated community in Crosby County, Texas, United States. According to the Handbook of Texas, the community had a population of 25 in 2000. It is located within the Lubbock [metropolitan area].HistoryThe Cap Rock area was established in 1925.GeographyCap Rock is located on Texas [State Highway 207] at the edge of the Caprock on the Salt Fork [Brazos River], east of Lubbock in Crosby County.