From Runners World
Last week the Chicago Marathon rolled out a new way to enter the 2018 race without the hassle of participating in the registration lottery. Runners who meet qualifying times specific to their age and gender will gain an automatic ticket to the starting line.
The new time standards are a strategy for race organizers to give participants of all ages an equal chance to qualify for guaranteed entry. In the past, the time qualifier guaranteed-entry option only applied to men who ran 3:15 or faster and women who had a sub-3:45 race to their names, no matter what their age.