Thumb Coast Ultra

Caseville, United States • 25 Apr 2026

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.

Race information

50 mi
50 Mile
50 mi
50 Mile Relay
50 km
50k
Visit the organization's website for the most recent information.
Trail runs nearby