2025 - Rock CF Rivers Half Marathon & 5K
2025 distances
Running
Half Marathon
NEW for 2025: The half marathon starts & finishes Grosse Ile HIGH School! * No race festivities will happen at the Middle School except for some limited race parking.
5K Run/Walk
The 5K starts inside of the Naval Hangar at GI Airport and finishes at Grosse Ile HIGH School! * No race festivities will happen at the Middle School except for some limited race parking.
Virtual Run
Half Marathon (NO SHIRT)
NEW for 2025: The half marathon starts & finishes Grosse Ile HIGH School! This category is NO SHIRT, NO MEDAL. * No race festivities will happen at the Middle School except for some limited race parking.
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 Grosse Ile
Different organizers, within 40 miles, in the next three months
Blitzen the Dotte
Ivf Warrior 5k Run/Walk
Blue Ribbon Run
Run With The Pack 5k
🏃 Plan Your Next Race in Grosse Ile
Find upcoming events by distance:
- Grosse Ile 5K Races 2 races
- Grosse Ile Running Calendar 2026 2 races
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, 2 Grosse Ile events
Spotted something wrong? Tell us and we'll fix it.