Thumb Coast Ultra 50 Mile, 50 Mile Relay, & 50k

Caseville, Michigan, United States

Apr 24, 2027 - Saturday

50k, 50mi, Relay

Race Information

Michigan’s Thumb is full of quiet roads, big skies, and unexpected beauty—and the Thumb Coast Ultra & Relay is your chance to run from one Great Lake to another. 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 rally your crew for the 50 Mile Relay and chase the sun across the Thumb. Can you beat sunset to the finish? This route follows mostly flat dirt roads through open farmland and lakeshore views, with generous cutoff times and fully stocked aid stations. It’s an ideal challenge for beginners going long for the first time, seasoned vets chasing a PR, or teams ready to take on 50 miles together.

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👍 Run Pick of the Month: Bunyan Battle 5K

📍 Brighton, MI - November 7, 2026

💸 SAVE $5 On Entry. Use Code: GLRM26

😄 Why We Like This Run
✅ Paved 5K Scenic Run/Walk
✅ Custom Dri-Fit Race Shirt, Finisher Medal, and Photos
✅ Enjoy Fall Colors and Post-Race Refreshments

Kick off Gameday with a little friendly rivalry at the Bunyan Battle 5K, where Michigan and Michigan State fans hit the pavement before the big matchup. The scenic, paved course winds through Island Lake State Park, bringing fall colors, team spirit and a head-to-head battle for bragging rights to the starting line!

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Race Facts

Race Size: 100 - 500

Elevation: Some Hills

Course Type: Road

Boston Qualifier: No

Kids Run: No

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