Race or not race?

Hello!
I am just coming off an injury which has kept me swimming for the last month, I have a race in the beginning of October that I really want to run but also don't want to have a set back in my recovery. I strained my right leg and it is recovering very nicely, the furthest I've run is about an hour and I'm going to try and build over this next month. Is racing in October a bad idea, I don't want to sit out another month of running?

Thanks,
Laura P.
www.soulrun.com