We are coming back to beautiful Grosse Ile, Michigan for the 15th Annual Rock CF Rivers Half Marathon, 15K (NEW!) & 5K. Mark your calendars, race date is March 22, 2026.

Registration here: https://runsignup.com/Race/MI/GrosseIle/rockcfrivers

Half Marathon: 800 spots
15K (NEW!): 300 spots
5K Run/Walk: 500 spots

Start for the Half Marathon and 15K will take off from the Grosse Ile Middle School at 8:00am and the 5K will take off from the Grosse Ile Airport at 8:15am. The 15K will finish at the Grosse Ile Airport. The Half Marathon and 5K will finish at the Grosse Ile Middle School, not the High School.

For more info, visit Rock CF Foundation: https://letsrockcf.org/rock-cf-half