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

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From Trivium Racing

  • Date Sun 2nd November 2025
  • Time 8:00AM EST
  • Location Port Austin, Michigan
  • Price $45.00 - $102.70
  • Races 3 races
  • Distances 5km, Half Marathon

Event summary

Get ready for an unforgettable experience at The Rock CF Thumb Coast Marathon, Half Marathon, and 5K, taking place on Sunday, November 2, 2025, in the picturesque Port Austin, Huron! Organised by Trivium Racing in collaboration with The Rock CF Foundation, this event promises a flat and fast course, offering breathtaking views of Lake Huron. Runners will kick off the Full Marathon in historic downtown Caseville, journeying east to a vibrant finish line in beautiful Port Austin. Meanwhile, the Half Marathon will begin at Sleeper State Park, also culminating at the downtown finish. Don’t miss out on the 5K, which features a scenic loop around downtown Port Austin, allowing participants of all levels to join in on the fun.

This event is not just about personal achievements; it also supports a noble cause. Proceeds from the race directly benefit the Rock CF Foundation’s mission to empower individuals living with cystic fibrosis across the nation. Mark your calendars and lace up your running shoes for a day filled with community spirit, stunning scenery, and the chance to make a difference!

Organiser's Description

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. Starting in historic downtown Caseville, this point-to-point course will travel east with a downtown finish in beautiful Port Austin.

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

The Full Marathon will start in Caseville and finish in Port Austin, whereas 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. Detailed maps of all courses will be posted soon.

Races

  • Marathon

    Incl. $7.70 Fee & Crewneck

    Sun 2nd November 2025 (8:00AM EST)

    $102.70

  • Half Marathon

    Incl. $6.50 Fee & Crewneck

    Sun 2nd November 2025 (8:30AM EST)

    $81.50

  • 5k

    Incl. $5.00 Fee & Crewneck

    Sun 2nd November 2025 (8:30AM EST)

    $45.00

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Location

8774 Lake St. Port Austin, Port Austin, 48467, MI, United States

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Nov 2, 2025

$45.00 - $102.70