The Dead Mile.

Comic book nerd Tyler's knowledge is put to the test when he heads down to meet the girl of his dreams, Krystle, at the annual Calgary zombie walk. Unbeknownst to him his best friend Johnny Boy has been infected and has started an actual zombie outbreak within the fun loving, costumed zombies. Now Tyler must use his wits to keep a small group of survivors alive while trying to rescue Krystle from the ominous Johnny Boy and the growing numbers of the living dead.