Under which category would a group for people training for a specific athletic event go?

Hi!

I'm training for the Norton Cancer Institute's 2009 Ride to Conquer Cancer, and I'd like to start a group for CalorieCounters who are doing this ride -- assuming I'm not the only one here, in which case, it would be a mighty small group :D

I'm not sure where to put a group of this nature -- exercise?  Motivation?  Interests?  Location (since I'm assuming most riders will be from around the area where the ride takes place, though I could be wrong)?

Any ideas?

Thanks!