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/finish for the Half Marathon and 15K will take off from the Grosse Ile HIGH School at 8:00am and the 5K will take off from the Grosse Ile Airport at 8:15am. Both races will finish at the Grosse Ile HIGH School, not the Middle School.

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