Report feedback about this race
Loading race details…
Loading race details…
Distances: Marathon (42.195 km) · 5 km
Opening: Oct 8, 2026, 8:00 AM (America/Chicago)
Closing: Oct 29, 2026, 2:00 PM (America/Chicago)
One of the six World Marathon Majors, known for the fastest and flattest course among all the Majors. The route winds through 29 Chicago neighborhoods - from the Loop, through Lincoln Park, Chinatown and Pilsen, finishing in Grant Park on the shore of Lake Michigan. More than 50,000 runners from around the world take the start line, and the course's near-perfectly flat profile makes Chicago a favorite spot for chasing personal bests. It's one of the six races that count toward the prestigious Six Star Finisher title.
Estimated from typical weather around this date — this race has no real race-day history at its new date yet (these are not days anyone actually ran).
2025
2024
2023
Timing weights apply to climbs, not turns. Elevation totals use the smoothed profile used by Index.
C = min(100, (mean raw weather burden / 150) × distance exposure factor × 100). Weather is averaged by local race hour across three full years.
Touch the route or chart to select a point.
Total elevation gain
≈ 0 m
Total elevation loss
≈ 3 m
A monthly roundup of marathons opening registration, new races, and course updates.
No spam. Unsubscribe anytime.
Nearest airport
Chicago Midway International AirportMDW
Chicago O'Hare International AirportORD
Gary/Chicago International AirportGYY
Chicago Executive AirportPWK