Chicago’s marathon has quietly become one of the most record-friendly courses in the sport, and the 2026 edition arrives with a record field to match.
## The Basics
The 2026 Bank of America Chicago Marathon takes place on Sunday, October 11, 2026, marking the 48th running of the race. It is the sixth of seven World Marathon Majors this year, coming two weeks after Berlin and three weeks before New York.
## A Record-Breaking Course
Chicago’s flat, unobstructed course has produced seven marathon world records, the most recent coming in 2024 when Ruth Chepngetich became the first woman ever to break 2:10:00, clocking 2:09:56. That run alone has raised expectations for what the women’s elite field might produce in 2026.
## By the Numbers
– Over 200,000 applied for the 2026 race, a record for the event
– An estimated 53,000 runners are expected to finish
– The race marks the second edition run under Chicago’s newly reduced qualifying time standards
## Why Chicago’s Conditions Help
Chicago typically offers cool, calm race-day weather in early October, a combination that, paired with its pancake-flat layout, is a major reason the course has become such fertile ground for fast times. Unlike Berlin’s late-September heat risk, Chicago’s autumn timing tends to work in runners’ favour more consistently.
For a look at the race immediately before Chicago on the Majors calendar, see our Berlin Marathon complete guide. Chasing the full Majors set this year? Our New York City Marathon guide covers the final major of the fall season, and if endurance sport is your focus, don’t miss our Ironman World Championship 2026 guide.
## Final Word
With record applications and a course built for fast times, Chicago’s 2026 edition has all the ingredients for another headline-making performance.