19 – 22 May 2019 San Antonio, Texas, United States

20 – 23 May 2018 Salt Lake City, Utah, United States

2 – 5 April 2017 Houston, Texas, United States

19 – 22 June 2016 Calgary, Alberta, Canada

31 May – 3 June 2015 Denver, Colorado, United States

6 – 9 April 2014 Houston, Texas, United States