Here's what you need to know if you are running or cheering on an athlete during Chicago's Turkey Trot races o8.

A record number of runners (and walkers) were expected to hit the street this morning, burning off a few calories before tearing into their turkey. The annual ‘turkey trot’ tradition goes back longer than you might think.

A look at the history of this York tradition, which fills the streets with runners, making family memories and raising money for cancer survivors.