1. Chicago Marathon
Photo: Courtesy of Chicago Marathon
2. Arlington Million
Photo: Four Footed Foto
3. Shamrock Shuffle
Photo: Edgar S. Barbosa
4. Bike the Drive
Photo: Courtesy of MB Bike the Drive
5. Chicago Polar Plunge
Photo: David T Kindler/Chicago Photo Press
6. Susan G. Komen's Mother's Day Race for the Cure
Photo: Courtesy of Susan G. Komen
7. Chicago Triathlon
Photo: Mehmet Ali Engin
8. AIDS Run & Walk Chicago
Photo: Courtesy of AIDS Foundation of Chicago
9. Race to Mackinac
Photo: MISTE Photography
10. Pets Are Worth Saving Walk or Run for Their Lives
Photo: Richard Chen