Summerlin is a 23,400 acre (94.6 km²) planne community being built by The Howard Hughes Corporation (now an affiliate of General Growth Properties) in southern Nevada, along the western rim of the Las Vegas Valley near the Spring Mountains and Red Rock Canyon National Conservation Area. It includes a variety of land uses, including: residential, commercial, recreational, educational, medical, open space, and religious. As of December 2003, Summerlin's population was 84,350.