Today is Chicago's CHIditarod!
CHIditarod is a 100% volunteer-driven urban shopping cart race. People register with 5-people teams, choose a theme, and dress (costume) a shopping cart and race it around the city of Chicago from community to community. It tends to be a costumed beauty pagent, a bit of a talent show, fund-raiser and overall general chaos creator.
Of course the real purpose behind the CHIditarod race is to raise money for the Greater Chicago Food Depository and the CHIditarod foundation.
It's too late to register for today's race... but not too late to get out there and cheer them on.