Port Austin, United States of America · Sunday 8 November 2026
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 atm
Adjusted Time
1:40:47
Time difference: -4.2 minutes compared to a flat, road, temperate course.
The Rock CF Thumb Coast Marathon, Half Marathon, and 5K is a half marathon held in Port Austin, United States of America, scheduled for Sunday 8 November 2026. The course is run on road surface with 0m of total elevation gain, reaching a maximum altitude of 0m above sea level. For registration and full race details, visit the official The Rock CF Thumb Coast Marathon, Half Marathon, and 5K website.
This is a very flat course with only 0m of total elevation gain across the full distance. The course ranges from 0m to 0m above sea level — a 0m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.
The Rock CF Thumb Coast Marathon, Half Marathon, and 5K is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
Our difficulty rating for The Rock CF Thumb Coast Marathon, Half Marathon, and 5K is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based half marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
Looking for an easier marathon or a tougher challenge? You can also compare The Rock CF Thumb Coast Marathon, Half Marathon, and 5K against other half marathons to find the right race for your goals.
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