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

Race Details

The Rock CF Thumb Coast Marathon, Half Marathon, and 5K returns to Michigan’s Thumb on Sunday, November 8, 2026. This second edition brings runners back to the flat, fast, USATF-certified course stretching along the Lake Huron shoreline. The Marathon is a Boston Qualifier, and both the Marathon and Half Marathon will once again feature pace teams from Beast Pacing to help you dial in your goal. Starting in Caseville and finishing in downtown Port Austin, this point-to-point race blends speed, scenic coastal views, and small-town hospitality—making it an ideal fall race-cation.

Why run Thumb Coast?

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

Courses and Pricing

• Marathon: 26.2 Miles. Prices: $115 (until July 7), $130 (until Sep 7), $140 (Race Date). Starts in Caseville, finishes in Port Austin.
• Economy Marathon: 26.2 Miles. Prices: $75 (until July 7), $90 (until Sep 7), $100 (Race Date).
• Half Marathon: 13.1 Miles. Prices: $95 (until July 7), $100 (until Sep 7), $105 (Race Date). Starts in Sleeper State Park, finishes in Port Austin.
• Economy Half Marathon: 13.1 Miles. Prices: $55 (until July 7), $60 (until Sep 7), $65 (Race Date).
• 5K Run/Walk: 3.1 Miles. Prices: $35 (until July 7), $38 (until Sep 7), $43 (Race Date). Starts and finishes in downtown Port Austin.
• Economy 5k: 3.1 Miles. Prices: $23 (until July 7), $25 (until Sep 7), $27 (Race Date).
• Virtual Marathon: 26.2 Miles. Price: $50.
• Virtual Half Marathon: 13.1 Miles. Price: $50.
• Virtual 5k: 3.1 Miles. Price: $50.

Proceeds from this event go directly towards the Rock CF Foundation’s mission to support those living with cystic fibrosis.