Chain of Rocks Bridge Duathlon
About this race
The Chain of Rocks Bridge has become the permanent home of our Spring Duathlon. Originally held on the historic Eads Bridge we re-located the event to a longer bridge and a more rural bicycle course. Participants will run from Start Line to the Mississippi River and back, followed by a flat, fast out and back bike circuit, returning to a final out and back run leg to the river and back with great views of the mighty Mississippi River. Awesome, right?!
Pick your distance
Duathlon
Individual Duathlon
Distances: 1.5 mile run – 12 mile bike – 1.5 mile run
Duathlon Relay
Distances: 1.5 mile run – 12 mile bike – 1.5 mile run
Typical race-day weather
Based on 1 year of Open-Meteo archive data for this event's race dates in Granite City, plus the 3 days either side.
The sun rises at 6:00 AM and sets at 7:54 PM local time (CDT) in Granite City on May 3, 2026 — 13h 54m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Other races near Granite City
Different organizers, within 40 miles, in the next three months
St. Elizabeth Royal Run 5K
The Oreo Roubaix Gravel Ride
Edwardsville Turkey Trot 5K
Ewc 5K Race & Kids Fun Run
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 4 Granite City events
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