Wearing the right clothes for running may make you feel more comfortable when running in public. For women, it's especially important to wear the right sports bra .
If you're worried about spectators judging you, try to think about it from their perspective. If they're honest with themselves, they're most likely looking at you thinking, "Wow, I wish I had the courage/fitness/dedication to run a race." And if they are making some kind of negative judgment, just brush it off. They're probably doing it to compensate for feelings of jealousy or insecurity for not being out there themselves.
And, remember, the first time is usually the hardest. If you're not used to running in public, you'll feel much more comfortable once you've done it a few times.
