It's almost race day in Chicago and that will mean thousands of runners and spectators flocking to the city for the biggest run of the year: the 2025 Bank of America Chicago Marathon .

This year's race could see even more records broken as the marathon enters its 47th year.

But whether you're participating, spectating or just trying to get around Chicago there's plenty you should know.

Here's what you should know:

When is the 2025 Chicago Marathon?

The Chicago Marathon steps off on Oct. 12.

One day prior to the race, Grant Park will also host the Abbott Chicago 5k.

What time is the Chicago Marathon?

The event begins with the men's wheelchair race start at 7:20 a.m. CT on Sunday.

Marathon start times are staggered into "carousels," so runners will cross the finish line at varying

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