<p>This is the Chicago Triathlon — where the world comes to race in, around and under this historic city’s architectural masterpieces. It’s where beginner and elite athletes alike come to be challenged, as well as inspired. It’s Chicago’s only triathlon, with 38 years of premier venues, premium amenities and awe inspiring spectating. It’s your chance to race this incredible city and include yourself in one of its greatest traditions.</p>

Today the Bank of America Chicago Marathon announced the return to 45,000 participants for the event's 45th anniversary on Sunday, October 8, 2023. Runners who entered the non-guaranteed entry drawing for the 2023 race will be notified of their selection status today. Individuals still interested in participating can secure their place in the field by joining an official charity team. Since 2002, the Charity Program has generated more than $292 million for local, national and global causes, including the event record-breaking $27.6 million raised by participants in 2022. 

Bank of America Chicago Marathon Set to Welcome 45,000 Participants for 45th Anniversary Event : Runners Can Still Take Part by Joining a Charity Team; Participants Raised $27.6 Million in 2022

Chicago Marathon

Pre-Race Review/ Lineup

For its 45th anniversary on October 23, 2023, Chicago Marathon will have 45,000 participants.

2023 Bank of America Chicago Marathon Returns to 45K Participants for 45th Anniversary Event

Post-Race Review/ Results

Here is the reason behind the disqualification of 7 runners who cheated in the 2022 Chicago Marathon in October; 40 more obviously cheated.

Chicago Marathon - 7 Disqualified, 40 More Likely Cut The Course after 35K Checkpoint

A comprehensive guide on how to enter for the October 8, 2023 Chicago Marathon.

Chicago Triathlon - News and Press Releases