2025 Chicago Marathon Qualifying Times. If you meet these time qualifications, you have a guaranteed chicago marathon entry. The application period is open for 4 weeks and there are no exceptions for late entry, so you need to act on this now if you’d like to claim a guaranteed or lottery entry.

The chicago marathon organizers recently released the qualifying times for the 2025 edition and made some dramatic changes. Chicago marathon released their 2025 time qualifications today and they are fast, fast, fast.