The Circle T Ranch was established by J. Glenn Turner, a prominent Texas attorney, in 1952. An avid outdoorsman and rancher, Turner raised Black Angus and Charolaise cattle as well as Tennessee Walking horses, and as a successful competitive rider he became president of the Tennessee Walking Horse Breeders Associations of America in 1952. To avoid annexation of the Circle T Ranch by another town, Turner and his neighbors incorporated the Town of Westlake in December 1956. He remained engaged in Westlake’s development until he sold the Circle T Ranch to Nelson Bunker Hunt in 1969. Hunt developed a highly successful horse breeding and racing operation on the ranch and won Outstanding Breeder awards in 1976, 1985, and 1987. In 1993, the Circle T Ranch was sold to H. Ross Perot, Jr. In the late 1990's, Hillwood, a Perot company, added residential and commercial development with Vaquero and Fidelity Investments, and later with Deloitte in 2012.