Where is the olympic track cycling take place?

For the 2008 Games in Beijing, the USOC had three official track training centers: 1) ADT Event Center Velodrome in Carson, CA

2) Lehigh Valley Velodrome in Trexlertown, PA

3) 7-Eleven Velodrome in Colorado Springs, CO A BMX training facility was opened in January, 2008 at the US Olympic Training Center in Chula Vista, CA.