Course
The 50 mile runs point-to-point from Harbor Beach at sunrise to Caseville County Park along Michigan's Thumb coast, about 85% dirt roads, 10% paved and 5% unimproved park roads, with only around 500 feet of climb. The 50K is an out-and-back from Caseville County Park beach on mostly gravel and unimproved roads. Terrain is open farmland and lakeshore.
Key dates
- !RegistrationOpen now
- ★Race daySat 24 Apr 2027
About
Michigan's Thumb is full of quiet roads, big skies and unexpected beauty, and the Thumb Coast Ultra & Relay runs from one Great Lake to another. Racers take on a point-to-point 50 mile from Lake Huron in Harbor Beach to Saginaw Bay in Caseville, a fast and scenic 50K out-and-back, or a 50 mile relay across the Thumb.
Save Thumb Coast Ultra & Relay to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Wood Memorial Trout Run
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Norway Spring Classic 2026
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Hurt the Dirt
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Family Service and Children's Aid Annual 5K Run/Walk
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A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.