Every bird-legged, sunken-chested, girly-voiced loser on this site will say, "Definitely State meet! I didn't even go to my prom because...er... I was too cool, didn't want to spend the money, etc." The common story. We all know the truth, though.
Don't be a loser. You have your entire life to run (and lose) races, but this is your only senior prom. Are you going stag? If not, what does your date think about you just bailing on her? You're probably a troll... But anyway, if not, you should go to prom. Make the most of it! Find that girl in the corner whose date was a jerk and ask her to dance. Play your cards right, and you'll end up having a VERY happy night. Despite what the basement-dwelling virgins on here will tell you, you'll regret MUCH MORE missing the prom than the state track meet. Don't make their mistake. Go to prom, have a blast, and end the night by making love to a woman (girl?).