In 36 days · Sun, Nov 8, 2026
Don't let race day sneak up
One email during race week. That's it.
Sunday, November 8th, 2026
8774 Lake St. Port Austin, Port Austin MI
Marathon · Half · 5K
38–49°F · some rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2025
35–42°F
dry
2024
45–54°F
dry
2023
36–40°F
rain
2022
38–47°F
dry
2021
46–60°F
dry
2020
51–71°F
dry
2019
26–31°F
dry
2018
35–39°F
dry
2017
30–42°F
dry
2016
49–55°F
dry
Best months to race in Michigan →
Typical start here is 38°F — see the cold-start kit →
About this race
Rock CF Thumb Coast Marathon, Half Marathon & 5K – November 8, 2026
The Rock CF Thumb Coast Marathon, Half Marathon, and 5K is coming to Michigan on Sunday, November 8, 2026. This second year event offers a flat, fast, fully paved, 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 hit your goals. Starting in Caseville and finishing in downtown Port Austin, this point-to-point race delivers the perfect combination of speed, scenery, and small-town charm. Whether you’re chasing a PR, running your first race, or planning a fall race-cation, the Rock CF Thumb Coast Marathon has it all.
Race Details
- Date: Sunday, November 8, 2026
- Distances: Marathon, Half Marathon, 5K
- Locations: Marathon starts in Caseville, Half Marathon in Sleeper State Park, 5K in downtown Port Austin—all finishing in Port Austin, Michigan
- Course: Fully paved, flat, USATF-certified: Marathon is a Boston Qualifier
Why Run Rock CF Thumb Coast Marathon?
- Fast & Flat: The Marathon and Half feature fully paved, USATF-certified courses, ideal for personal bests and Boston qualification.
- Pace Teams: Beast Pacing will guide Marathon and Half Marathon participants with consistent splits.
- Cool November Temps: Crisp, race-ready weather on Michigan’s Thumb sets the stage for strong performances.
- Run for a Cause: Every registration supports the Rock CF Foundation and its mission to improve the lives of people living with cystic fibrosis.
- Unique Experience: Traverse Michigan’s Thumb from one side to the other, while 5K runners loop around downtown Port Austin and finish in time to cheer on the Half and Full finishers.
- Race Extras: Participant swag includes exclusive gear, plus referral incentives that give you money back when friends join.
- Destination Vibes: Enjoy a fall weekend on Michigan’s Thumb Coast, complete with small-town hospitality, Lake Huron views, and a lively finish line atmosphere.
More Than Just a Race
Your experience at the Rock CF Thumb Coast Marathon goes beyond the miles. Every step helps fund the Rock CF Foundation, a nonprofit dedicated to supporting individuals living with cystic fibrosis through awareness, advocacy, and action. By racing with us, you’re not only pushing your own limits—you’re helping power life-changing programs and research.
Ready to run Michigan’s Thumb? Don’t wait—register today for the Rock CF Thumb Coast Marathon, Half Marathon, and 5K on November 8, 2026 and be part of a flat, fast, meaningful race experience on the shores of Lake Huron. For more information, visit the official race page.
Course map
Train with a club
Run clubs near Port Austin to train with before race day.
See all run clubs near Port Austin →Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.