The Bank of America Chicago Marathon is back this weekend!

To many, this may just seem like another foot race in the city, to some it’s a traffic nuisance, but to the city, it’s a massive revenue-maker. The famed marathon will bring in an estimated $300 Million for the city.

For city commuters, ABC 7 Chicago has a complete list of street closures. The marathon itself kicks off on Sunday at 6:30 AM in Grant Park.