CHICAGO (CBS) — The registration period for the 2013 Bank of America Chicago Marathon, to be run this year on Sunday, October 13, is coming, and going, soon.

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Registration for the event opens Tuesday at 12 p.m. online at chicagomarathon.com and is open to the 45,000 runners.

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The cost of entry is $175 for U.S. participants and $200 for participants outside the U.S. Registration will close when capacity of 45,000 is reached.

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The Bank of America Chicago Marathon is one of the six world marathon majors, the most prestigious marathons in the world.