Thumb Coast Ultra

The Thumb Coast Ultra & Relay is an annual ultramarathon event held in Michigan's Thumb region, scheduled for April 25, 2026. It features a point-to-point 50-mile race from Harbor Beach on Lake Huron to Caseville on Saginaw Bay, a scenic and mostly flat course with about 85% dirt roads and minimal elevation gain (~500 feet). There is also a 50K out-and-back race starting and finishing at Caseville, plus a 50-mile relay option. The event offers generous cutoff times, well-stocked aid stations, and special awards for 50-mile finishers who "beat the sun" by finishing before sunset. It welcomes runners, ruckers, and relay teams of all experience levels, providing a unique coast-to-coast spring running adventure. Visit the organization's website for the most recent information.