The 2025 Chicago Marathon is almost upon us. On Sunday, October 12, more than 50,000 runners will convene in Grant Park and race through the city, sweeping through 29 neighborhoods. Whether you’re participating in the big race or just cheering on the runners, the following is a list of vital information you need to know, including start times, the marathon route and best places to watch.

When is the Chicago Marathon?

The 2025 Chicago Marathon is Sunday, October 12.

What is the Chicago Marathon route?

The marathon starts and finishes in Grant Park, weaving through 29 neighborhoods across the city. Runners will charge north through downtown along LaSalle St toward Lakeview, before looping around to head south down Broadway, Clark St and more. They will then head west across the Chicago R

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