For most folks, Halloween is a time to get dressed up as some sort of slutty occupation, gorge on candy and begin the period of "winter obesity" traditional in these United States. But for others -- specifically our nation's often marginalized undead population -- Halloween is a time for their most important work of the year: seeking out a helping of delicious, delicious brains. Though the undead procession won't reach Denver proper until October 23 with the official 2010 Zombie Crawl, zombies move very slowly, which required them to get started in Littleton this weekend on the move steadily, hideously northward. Photos by Bert Ross.