15th Annual Rock CF Rivers Half Marathon & 5K
- Date Sun 22nd March 2026
- Time 8:00AM EDT
- Location Grosse Ile, Michigan
- Price $43.40 - $91.10
- Races 4 races
- Distances Half Marathon, 5km
Event summary
Get ready to lace up your running shoes for the 15th Annual Rock CF Rivers Half Marathon, 5K Run/Walk, and the exciting new 15K event on Sunday, March 22, 2026! This vibrant race takes place in Grosse Ile Township, MI, starting and finishing at the Grosse Ile Middle School. With the half marathon kicking off at 8:00 AM and the 5K Run/Walk following at 8:15 AM, participants will enjoy a scenic course while supporting a fantastic cause—outrunning cystic fibrosis!
Join a spirited community dedicated to changing the narrative around cystic fibrosis, with 100% of proceeds benefiting the Rock CF Foundation. With caps set at 800 for the half marathon, 300 for the 15K, and 500 for the 5K, make sure to secure your spot early! Can't make it in person? Don't worry! A virtual run option allows you to participate from anywhere. Whether you're a seasoned runner or just starting out, this event promises a day of fun, camaraderie, and inspiration. Let’s come together to celebrate resilience and make a difference—tag us on social media @LetsRockCF to share your journey!
Join a spirited community dedicated to changing the narrative around cystic fibrosis, with 100% of proceeds benefiting the Rock CF Foundation. With caps set at 800 for the half marathon, 300 for the 15K, and 500 for the 5K, make sure to secure your spot early! Can't make it in person? Don't worry! A virtual run option allows you to participate from anywhere. Whether you're a seasoned runner or just starting out, this event promises a day of fun, camaraderie, and inspiration. Let’s come together to celebrate resilience and make a difference—tag us on social media @LetsRockCF to share your journey!
Organiser's Description
THE ROCK CF RIVERS HALF MARATHON IS BACK!
JOIN US AS WE OUTRUN CYSTIC FIBROSIS!
SUNDAY, MARCH 22, 2026
Rock CF is hitting the island for the 15th Annual Rivers Half Marathon, 5K Run/Walk & NEW 15K!
Rock CF is a community, thousands strong, changing the face of what living with cystic fibrosis looks like and giving those living with CF the tools to not only survive, but thrive. 100% of all proceeds support the mission of the ROCK CF FOUNDATION [https://letsrockcf.org/].
CAPS FOR 2026
Half Marathon Cap = 800
15K Cap = 300
5K Run/Walk Cap = 500
HALF MARATHON
START TIME: 8:00am
START LOCATION: GROSSE ILE MIDDLE SCHOOL - 23270 E RIVER RD, GROSSE ILE TOWNSHIP, MI 48138
FINISH LOCATION GROSSE ILE MIDDLE SCHOOL - 23270 E RIVER RD, GROSSE ILE TOWNSHIP, MI 48138
_________________________________________________________________________________________________________________________
15K
Start Time: 8:00am
Start Location: Grosse Ile Middle School
Finish Location: Grosse Ile Airport Area [https://maps.app.goo.gl/xJRA5U6KmddAHSqeA]
________________________________________________________________________________________________________________________
5K RUN/WALK
START TIME: 8:15 am
START LOCATION: Grosse Ile Airport [https://maps.app.goo.gl/Q8zbyfG1VNWE7ZL9A](Naval Hangar)
FINISH LOCATION: Grosse Ile Middle School
_________________________________________________________________________________________________________________________
VIRTUAL RUN
We will be sending out packets the week of the race so that you can participate with us from wherever you are! Whether that be a walk around the block or a full half marathon, we can't wait to see what you accomplish. Be sure to tag us on our socials @LetsRockCF so we can share your journey and runs!
JOIN US AS WE OUTRUN CYSTIC FIBROSIS!
SUNDAY, MARCH 22, 2026
Rock CF is hitting the island for the 15th Annual Rivers Half Marathon, 5K Run/Walk & NEW 15K!
Rock CF is a community, thousands strong, changing the face of what living with cystic fibrosis looks like and giving those living with CF the tools to not only survive, but thrive. 100% of all proceeds support the mission of the ROCK CF FOUNDATION [https://letsrockcf.org/].
CAPS FOR 2026
Half Marathon Cap = 800
15K Cap = 300
5K Run/Walk Cap = 500
HALF MARATHON
START TIME: 8:00am
START LOCATION: GROSSE ILE MIDDLE SCHOOL - 23270 E RIVER RD, GROSSE ILE TOWNSHIP, MI 48138
FINISH LOCATION GROSSE ILE MIDDLE SCHOOL - 23270 E RIVER RD, GROSSE ILE TOWNSHIP, MI 48138
_________________________________________________________________________________________________________________________
15K
Start Time: 8:00am
Start Location: Grosse Ile Middle School
Finish Location: Grosse Ile Airport Area [https://maps.app.goo.gl/xJRA5U6KmddAHSqeA]
________________________________________________________________________________________________________________________
5K RUN/WALK
START TIME: 8:15 am
START LOCATION: Grosse Ile Airport [https://maps.app.goo.gl/Q8zbyfG1VNWE7ZL9A](Naval Hangar)
FINISH LOCATION: Grosse Ile Middle School
_________________________________________________________________________________________________________________________
VIRTUAL RUN
We will be sending out packets the week of the race so that you can participate with us from wherever you are! Whether that be a walk around the block or a full half marathon, we can't wait to see what you accomplish. Be sure to tag us on our socials @LetsRockCF so we can share your journey and runs!
Races
-
Half Marathon
Incl. $6.10 Fee & Long Sleeve Tech Shirt
Sun 22nd March 2026 (8:00AM EDT)
$91.10
The Half Marathon starts & finishes Grosse Ile Middle School! -
15k
Incl. $5.20 Fee & T-Shirt
Sun 22nd March 2026 (8:00AM EDT)
$75.20
The 15K will start with the Half Marathon at Grosse Ile Middle School. -
5K Run/Walk
Incl. $3.40 Fee & Long Sleeve Tech Shirt
Sun 22nd March 2026 (8:15AM EDT)
$43.40
The 5K starts inside of the Naval Hangar at GI Airport and finishes at Grosse Ile Middle School! -
Virtual Run
Incl. $4.00 Fee & Long Sleeve Tech Shirt
$54.00
Reviews
Done this event?
First-hand event reviews from people who have been there, done that and got the breathable T-shirt, really help everyone choose their next event.
Add a reviewLocation
23270 E River Rd, Grosse Ile, 48138, MI, United States
Who's In
See who else is doing this event
Be the first
No-one has marked this event as 'Doing' or 'Maybe' yet. Will you be the first?
15th Annual Rock CF Rivers Half Marathon & 5K
