Im a big fan of not wearing shoes in general, but I ran today no shoes and loved it. Are you required to wear shoes at an event? I planned on getting some vibram five fingers but if I can save 70 bucks that would be awesome
In May I did the run part of a Sprint barefoot, no troubles at all but I would check with the people putting on the race. I've heard that iron distances races don't allow it.
I did a sprint this spring and a girl did the run in barefeet much to everyone's amazement. She does a bunch of races with her dad through this one race promoter so they all thought nothing of it. She is around my oldest daughter's age maybe 14 or so.
If it comes down to it ill either get some vibrams or those really thin nike free shoes.
You may want to check out the Runner's World Barefoot forum. (Not that I'm trying to get you off the BT website! It's just that they're having a whole discussion about barefoot running, vibrams and alternative footwear....)
When I was in High School the coach gave me a hard time for running barefoot around the track. He timed me for a mile and I finished in 4:55. He was never critical again.