6400 Main St, Caseville MI
Saturday, April 25th, 2026
Thumb Coast Ultra &: Relay is a one-of-a-kind spring ultramarathon in Michigan’s Thumb. On Saturday, April 25, 2026, runners and ruckers will take on the challenge of racing from Lake Huron in Harbor Beach to Saginaw Bay in Caseville in the 50 Mile division—or team up with friends for the 50 Mile Relay. The 50K features a flat out-and-back course starting and finishing in Caseville.
Thumb Coast Ultra &: Relay is more than just a race—it’s a test of endurance, teamwork, and determination supported by a welcoming community. Participants can expect a well-marked course, fully stocked aid stations, and the camaraderie of runners, ruckers, and relay crews tackling the same adventure together.
For more information, visit the event page at Thumb Coast Ultra & Relay.
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