BOULDER, Colo. -- While small kids go door-to-door for Halloween treats, a group of older Boulder residents will be participating in the Naked Pumpkin run.

According to the group's Web site, participants are encouraged to bring friends and shoes and a pumpkin.

The group calls the run "Boulder’s largest and longest running community arts project."

Click here to watch an audio slide show of last year's Naked Pumpkin Run.