Races›United States›Michigan›The Rock CF Thumb Coast Marathon, Half Marathon, & 5K
Port Austin, MI, seen from above
Sunday 8 November 2026

The Rock CF Thumb Coast Marathon, Half Marathon, & 5K

Port Austin, Michigan · United States
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Flat course along Lake Huron, Caseville to Port Austin

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Course

Fully paved, USATF-certified courses along Lake Huron in Michigan's Thumb. The marathon runs point-to-point from downtown Caseville to downtown Port Austin, the half marathon starts at Sleeper State Park and finishes in Port Austin, and the 5K is a loop around downtown Port Austin. All three are flat and fast.

Marathon42.2 km
Half Marathon21.1 km
5K5 km

Key dates

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About

Get ready to experience Michigan's Thumb Coast like never before! Co-produced by the Rock CF Foundation and Trivium Racing, the Thumb Coast Marathon, Half Marathon, and 5K offer stunning views of Lake Huron along a flat, fast course perfect for runners of all levels. From the historic charm of Caseville to the picturesque beauty of Port Austin, this race promises a journey you'll never forget. Whether you're chasing a PR or soaking in the scenery, this is your chance to run for a cause and make every mile meaningful.

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