15th Annual Rock CF Rivers Half Marathon & 5K

🏃‍♀️ 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.

🎉 Participation Caps

• 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

🏃 5K RUN/WALK

• Start Time: 8:15 am
• Start Location: Grosse Ile Airport (South of 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!

🔗 More Information

For further details, visit the official race page: Rock CF Rivers Half Marathon & 5K.