The events aim to build communities and encourage active lifestyles through running.
The 8K took place in cold weather with several big names leading the field.
One of the world's best running cities has plenty of memorable running routes.
In its sixth year as Chicago’s premier half-marathon, the Rock ‘n’ Roll Chicago Half Marathon presented by HumanaVitality welcomed
In its sixth year as Chicago’s premier half-marathon, the Rock ‘n’ Roll Chicago Half Marathon presented by HumanaVitality
Shalane Flanagan and Andy Wacker won the 2014 Rock 'n' Roll Chicago Half Marathon.
Check out these shots from a warm day in the Windy City!
Rock 'n' Roll Chicago kicked off with a 5K on Saturday!
Runners had the chance to meet America's best female marathoner before Rock 'n' Roll Chicago.
She got hit in the eye on her way home from work.