The Rock CF Thumb Coast Marathon
The Rock CF Thumb Coast Marathon, Half Marathon, and 5K is a scenic running event held on Michigan’s Thumb Coast, starting November 2, 2025. The marathon is a point-to-point race from downtown Caseville to downtown Port Austin, featuring a flat, fast, fully paved USATF-certified course with stunning views of Lake Huron. The half marathon begins at Sleeper State Park and finishes in Port Austin, while the 5K is a loop around downtown Port Austin, sharing the same finish line.
Organized by the Rock CF Foundation and Trivium Racing, the event supports cystic fibrosis awareness and offers virtual race options. It promises a memorable experience along Michigan’s beautiful coastline. Visit the organization's website for the most recent information.
Always double-check with the organizer's website – things can change, and we might have sprinted past a few details!
