Thumb Coast Ultra

Event overview

The Thumb Coast Ultra & Relay takes place on April 25, 2026 in Michigan’s Thumb region, finishing at Caseville County Park. The event offers multiple race options and supporting categories for individual and team entries. Participants may run, ruck, or join relay crews.

• 50 Mile point-to-point from Harbor Beach to Caseville
• 50K out-and-back starting and finishing at Caseville County Park
• 50 Mile Relay team division
• 50 Mile Ruck and 50K Ruck
• Virtual 50 Mile and Virtual 50K
• Pacer registration available

Courses and logistics

The 50 Mile course is point-to-point and uses about 85% dirt roads, 10% paved roads, and 5% unimproved park roads, with roughly 500 feet of elevation gain. The 50K is an out-and-back that uses mostly unimproved and gravel roads and has lower elevation gain (about 220 feet). The course is marked and includes multiple aid stations stocked with water, Tailwind, gels, and real food. Registration includes a custom jacket, bumper sticker, reusable silicone race cup, a finisher's medal, race photography, and post-race food. Early packet pickup is scheduled the day before at Thumb Brewery in Caseville. Cutoff times and an additional prize for 50 Mile finishers who complete the course before sunset are part of the event rules. Visit the organization's website for the most recent information.