Circle C Ranch is a large master-planned community in southwest Austin, Texas, USA. Development of Circle C Ranch began in 1982, with the first homes in the community in built in 1986. Today, Circle C Ranch includes more than 6,400 homes. Amenities include an 18-hole golf course called the Grey Rock Golf Club, tennis club, four swim centers, a fire station, and more than 500 acres (2.0 km2) of dedicated parkland. The Circle C Swim Center has a year-round, outdoor, Olympic-size heated pool. A second, family oriented swimming pool complex, with office space and meeting rooms, was finished at the end of January 2012. The third pool in the Avana section of Circle C was built in 2014 and opened in 2015. The fourth pool located in the GreyRock section of Circle C opened in 2017.