I was looking at the web site too - I saw some pretty big names that did this in past years, assumedly as a race. Then I looked at the rules.... I would be really concerned about doing a race that was not at least done with a rolling enclosure. At the lower levels of road racing you seldom get the pleasure of having the road actually closed, even the Pro's don't get this very often in the US (this means you always have to stay to the right of the center line), but the corners are controlled and as long as you are in the race enclosure you can expect traffic to not interfere with your race. The rules for Tuscon said you need to follow all traffic laws/signs/signals etc. Does this mean even the "race" is not controlled? Sounds scary to me. Plain old ordinary orgainized centuries are bad enough since you need to deal with traffic and other riders, some of whom are following the rules of the road and some of whom are not. If it were a race I can't imagine the risks that some people would be willing to take. Anyone know if they run the different classifications differently?