It might have been a bit colder than we had hoped for the running of the 39th annual Shamrock Shuffle sponsored by Bank of America this past weekend but that didn't stop our photographer Christian Rasmussen
from capturing the energy of one of Chicago's largest races through hundreds of photographs.
Despite Chicago's trademark winds, Kenya's' Stephen Sambu won the race for the fourth year in a row with a time of 23:10. American, and first-time winner Laura Thweatt took home the trophy on the women's side with an overall time of 26:02.
Take a look at the collection of photographs below.