This Baltimore event is called Run For Your Lives, which sounds about right. Runners will wear flags (which represent life) while jumping and leaping over obstacles throughout a 5K course (unless you get lost, that is) while zombies chase them down and try to rip off their "life." If you cross the finish line without any remaining flags, you're dead (and ineligible for the prizes at the end of the race). Don't want to run? Don't worry! You can sign up just to partake in the fun afterparty and live music fiesta after the race!
This event is in Baltimore on October 22. You can get more info and sign up on the Run for Your Lives website and watch the promo video on YouTube. I think multiple cities should organize their own zombie 5K events so we can have that long-awaited zombie apocalypse.