Thumb Coast Ultra
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Event overview
Thumb Coast Ultra & Relay takes place on April 25, 2026 in Michigan’s Thumb region. The event offers multiple competition options across a point-to-point and an out-and-back format, including relay, ruck, and virtual divisions. The 50 Mile route runs from Harbor Beach on Lake Huron to the beach at Caseville County Park on Saginaw Bay. The event includes a special prize for 50 Mile finishers who complete the course before sunset.
Distances and formats
- 50 Mile
- 50K
- 50 Mile Relay
- 50 Mile Ruck
- 50K Ruck
- Virtual 50 Mile
- Virtual 50K
- Pacer
Courses and support
The 50 Mile course is point-to-point and reported to be roughly 85% dirt roads, 10% paved roads, and 5% unimproved park roads, with about 500 feet of elevation gain. The 50K is an out-and-back that starts and finishes at Caseville County Park and uses mostly unimproved and gravel roads. The course is described as well marked and served by fully stocked aid stations offering water, Tailwind, gels, and real food. The event uses generous cutoff times and a volunteer crew.
Registration and inclusions
Registration options include in-person and virtual entries, and ruck divisions. Typical registration items listed for participants include a custom jacket, bumper sticker, reusable silicone race cup, finisher's medal, race photography, and post-race food and drinks. Refund and transfer policies are stated on the organizer pages. Visit the organization's website for the most recent information.
