CASEVILLE TO PORT AUSTIN, MICHIGAN

Point-to-point, Fully Paved Course on Michigan's Thumb Coast

The Rock CF Thumb Coast Marathon, Half Marathon, and 5K comes to Michigan on Sunday, November 2, 2025! This inaugural event offers a flat, fast, USATF-certified course stretching across Michigan’s Thumb. The Marathon is a Boston Qualifier, and both the Marathon and Half will include pace teams from Beast Pacing to help you stay on track. Starting in Caseville and finishing in downtown Port Austin, this point-to-point race combines speed, scenery, and small-town charm—making it the perfect fall race-cation.

Why run Thumb Coast?

Fast & Flat: PR- and BQ-friendly Marathon & Half
Pace Teams: Consistent support from Beast Pacing
Cool Temps: Crisp November weather for racing
Run for a Cause: Every entry supports the Rock CF Foundation
Awesome Swag

Join us and experience Michigan’s Thumb like never before.

Your experience at this coastal marathon goes beyond just your own personal goals, as proceeds from this event go directly towards the Rock CF Foundation’s mission to support those living with cystic fibrosis around the country.

Learn more about the Rock CF Foundation: https://letsrockcf.org/

Start Times

Marathon: 8:00am

Location: Downtown Caseville, MI

Half Marathon: 8:30am

Location: Sleeper State Park, Caseville, MI

5K Run/Walk: 9:00am

Location: Downtown Port Austin, MI

Price Calendar

Marathon

$95 until July 1, 2025

$110 until September 1, 2025

$120 until November 2, 2025 (Race Date)

Half Marathon

$75 until July 1, 2025

$80 until September 1, 2025

$85 until November 2, 2025 (Race Date)

5K Run/Walk

$40 until November 2, 2025 (Race Date)

Building upon the success of Thumb Coast Ultra Series created by Trivium Racing hosted in the spring, the Thumb Coast Marathon and Half Marathon provides runners with the opportunity to experience the beauty of this storied Michigan coastline at the changing of the seasons in November. For any questions or comments, please contact using the form below!