Im assuming this is a RR. The organizers will typically let the various Categories roll out with enough time between them that one Category will not have to pass the other.
It happens sometimes that the pack in one category overtakes another Category. When that happens the officials neutralize the overtaken pack allowning the other to pass.
If you do find yourself either off the front of your race, or off the back, and around riders from other categories, the rule is you cannot work with them (i.e. draft) It shouldn't be too difficult to know they're in another race (one clue is look at the number sequence.)
Although if you're in a situation where everybody your with is off the back, and you're just riding to get home, no one is going to care if you pace up.
From the start times it appears that the 4's and the 5's may be run together as a combined field which is common. (in which case the stuff above doesn't apply 4's can work with 5's and vice versa)
Even if the 4's and 5's run together, it may be socred as one race, or it may be scored seperately.
If its the latter you need to figure out who the 5's are (see the numbe sequence comment) and mark them.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
Last edited by merlinextraligh; 03-05-09 at 10:22 AM.