Since 1991.

Cross country is Aug. 15. Look here for details:

http://www.bikereg.com/events/regist...?eventid=11267

and course directions here,

http://www.tourofthegila.com/register/index.html

It will probably be 70-80 degrees during the race, if that matters. Downhill race Aug. 14 if that is more your thing.