Most of the races are not run by XTERRA but are organized indedpendantly and "sanctioned" by XTERRA (similar to how USAT governs races, but doesn't necessarily put them on themselves). The best way to get specific information on a particular race would be to contact the race organizer directly. Do a quick google search for the race or go to the race website from the 2011 schedule on the XTERRA website. Once you get that, you can contact the organizer and hopefully figure out the answers to your questions. They probably have a tentative date for their event even if it isn't set in stone yet.