Rock CF Rivers Half Marathon

The 15th Annual Rock CF Rivers Half Marathon & 5K takes place on Grosse Ile, Michigan, offering a scenic lap around the island. The event features a Half Marathon, a 5K Run/Walk, a NEW 15K, and a Virtual Run, with all proceeds supporting the Rock CF Foundation’s mission. The Half Marathon starts and finishes at Grosse Ile High School, while the 5K starts in the Naval Station Hangar and ends at the high school; the 15K starts at the high school and finishes near the airport area.

A race expo is held the day before, and generous participant caps apply (800 for the half, 500 for the 5K, 300 for the 15K). Shuttles connect the venues throughout race weekend, contributing to a community, volunteer-driven atmosphere. Visit the organization's website for the most recent information.