When Is Chicago Marathon In 2025. Here are the results from the 2025 chicago marathon. The chicago marathon will begin bright and early at grant park on october 13, with gates opening to runners at 5:30 a.m.
Nearly 50,000 runners took to the streets of chicago on sunday (13 october) seeking the glory that comes with taking the crown at the 2025 chicago marathon. View results for the 2025 bank of america chicago marathon.