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.
Related Events
Summer Trail Fest Ultra and Half Marathon
Date: Jun 13, 2026 - Saturday
Size: 100 - 500 participants
Location: Laingsburg, Michigan
Greensboro Distilling Speakeasy 5K
Date: Jun 13, 2026 - Saturday
Size: 100 - 500 participants
Location: Greensboro, North Carolina
Trenton Summerfest Half Marathon, 8K and 5K
Get 10% Off - Use Code runguide10
Date: Jun 27, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Trenton, Michigan
Dearborn Decades 5K
Get 10% Off - Use Code RunGuide10
Date: Aug 9, 2026 - Sunday
Size: 100 - 500 participants
Location: Dearborn, Michigan
Run the 313 5k
Date: Aug 22, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Detroit, Michigan
Carpe Diem - Carpe Noctem Half Marathon and 10K - North Carolina
Date: Sep 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Pleasant Garden, North Carolina
Triple Lakes Trail Race
Date: Oct 24, 2026 - Saturday
Size: 100 - 500 participants
Location: Greensboro, North Carolina
End of the Road Half Marathon & 4 Miler
Date: Oct 24-25, 2026 - Saturday to Sunday
Size: 1,000 - 5,000 participants
Location: Waterfall, Pennsylvania
Rock CF Thumb Coast Marathon, Half Marathon, & 5K
Date: Nov 8, 2026 - Sunday
Size: 500 - 1,000 participants
Location: Caseville, Michigan
Black Toenail Friday Half Marathon & 7.5 Miler
Get 10% Off - Use Code RunGuides25
Date: Nov 27, 2026 - Friday
Size: 500 - 1,000 participants
Location: Commerce Township, Michigan
Running of the Lights
Date: Jan, 2027 (TBD)
Size: 500 - 1,000 participants
Location: Forsyth County, North Carolina
Winter Trail Fest (WTF) 13.1 & 5 Mile Eastside
Date: Feb, 2027 (TBD)
Size: 100 - 500 participants
Location: Brighton, Michigan
Winter Trail Fest (WTF) 13.1 and 5 Mile Westside
Date: Feb, 2027 (TBD)
Size: 100 - 500 participants
Location: Middleville, Michigan
Blackbeard's Revenge 100
Date: Mar 20-21, 2027 - Saturday to Sunday
Size: 100 - 500 participants
Location: Corolla, North Carolina
Only Fools Run Half Marathon, 10K, & 5K
Date: Mar, 2027 (TBD)
Size: 500 - 1,000 participants
Location: Greensboro, North Carolina
Carpe Diem - Carpe Noctem Half Marathon & 10k
Date: Apr, 2027 (TBD)
Size: 500 - 1,000 participants
Location: Commerce Township, Michigan
Pig Pounder 5K
Date: Apr, 2027 (TBD)
Size: 500 - 1,000 participants
Location: Greensboro, North Carolina
Prove It 5K & 10k
Date: Apr, 2027 (TBD)
Size: 500 - 1,000 participants
Location: Milford Charter Township, Michigan
Thumb Coast Ultra 50 Mile, 50 Mile Relay, & 50k
Date: Apr 24, 2027 - Saturday
Size: 100 - 500 participants
Location: Caseville, Michigan
Owl's Roost Rumble Half Marathon and 4 Miler
Date: Apr, 2027 (TBD)
Size: 100 - 500 participants
Location: Greensboro, North Carolina
Moonlight Bootlegger 5K Greensboro
Date: May, 2027 (TBD)
Size: 100 - 500 participants
Location: Pleasant Garden, North Carolina
Highball to Thurmond Ultra & Relay
Date: May, 2027 (TBD)
Size: 100 - 500 participants
Location: Thurmond, West Virginia
👍 Run Pick of the Month: Fenton Festival Of Fitness
📍 Fenton, MI - June 26-27, 2026
💸 SAVE $5 On Entry. Use Code: GLRM26
😄 Why We Like This Run
✅ Fast and flat 1-mile, 5k, or Double Challenge
✅ Custom Dri-Fit Race Shirt, Finisher Medal, Race Photos, and Refreshments
✅ Proceeds benefit Fenton’s First Responders
Experience the high-energy Fenton Festival of Fitness, where runners can race a fast, electric mile under the Friday night lights and cross the finish on the stadium track with a crowd behind them.
The weekend continues with a fun, inclusive 5K and fitness events, blending race-day adrenaline with a festival atmosphere that celebrates community, competition, and giving back!
Get a Training Plan for this Run
Receive 2 FREE Weeks of personalised run training from our friends at Runna
The Runna app, the ultimate running coach in your pocket, gives you personalised programs that sync with your favourite devices, includes strength and mobility training, and offers complete support.
You get 2 weeks for free!
Learn more about Runna. Click the link below.
🏃 Looking For More Runs Near Michigan?
Find another distance:
Race Facts
Race Size: 100 - 500
Elevation: Some Hills
Course Type: Road
Boston Qualifier: No
Kids Run: No
Where to Stay
Use this map to find hotels and airbnb accommodation near this race location.