Experience the Beauty of Michigan's Thumb Coast!
The Rock CF Foundation and Trivium Racing are excited to bring to life the Thumb Coast Marathon: A flat, fast course featuring stunning views of Lake Huron on November 2nd, 2025. Starting in historic downtown Caseville, Michigan, this point-to-point course will travel east with a downtown finish in beautiful Port Austin, Michigan.
The Full Marathon will start in Caseville and finish in Port Austin; the Half Marathon will start in Sleeper State Park and finish at the same location in Port Austin. The 5K will be a loop around downtown Port Austin, featuring the same finish line as the Full and Half.