Popular Chicago Half Marathon & 5K. In 2022, the City of Chicago requested that the route be shortened just before the start of the race. A city spokesperson claimed that the change was necessary to “ensure the safety of race participants due to a conflict with vehicles around 31st Street,” which was related to traffic from the Chicago Bears game at Soldier Field. The race organizers did not inform any participants until after the race. The change resulted in a course that was 12.6 miles long. Past winners Notes External links Recent results Annual sporting events in the United States Half marathons in the United States Half marathon Recurring sporting events established in 1997 1997 establishments in Illinois