Thumb Coast Ultra & Relay - 50 Mile, 50K, & 50 Mile Relay
From Trivium Racing
- Date Sat 25th April 2026
- Time 5:00AM EDT
- Location Caseville, Michigan
- Price Free - $139.80
- Races 8 races
- Distances Ultra
Event summary
Get ready for an exhilarating day of endurance and camaraderie at the Thumb Coast Ultra & Relay, taking place on Saturday, April 25, 2026, in the picturesque Caseville, Huron! Organized by Trivium Racing, this unique spring ultramarathon invites runners and ruckers to experience the thrill of racing from the scenic shores of Lake Huron in Harbor Beach to the vibrant Saginaw Bay in Caseville. Participants can choose from three exciting race distances: the challenging 50 Mile, the rewarding 50K, or the fun-filled 50 Mile Relay, perfect for teaming up with friends.
The Thumb Coast Ultra & Relay promises a flat and fast course with minimal elevation gain—just 500 feet for the 50 Mile and 300 feet for the 50K—making it an ideal choice for both first-time ultrarunners and seasoned athletes looking to set personal records. With generous cutoff times, every participant has the opportunity to achieve their racing goals, and those who finish the 50 Mile before sunset will earn a special prize in addition to their medal. Expect a well-marked route, fully stocked aid stations, and the enthusiastic support of a welcoming community. Don’t miss out on this incredible spring running experience
The Thumb Coast Ultra & Relay promises a flat and fast course with minimal elevation gain—just 500 feet for the 50 Mile and 300 feet for the 50K—making it an ideal choice for both first-time ultrarunners and seasoned athletes looking to set personal records. With generous cutoff times, every participant has the opportunity to achieve their racing goals, and those who finish the 50 Mile before sunset will earn a special prize in addition to their medal. Expect a well-marked route, fully stocked aid stations, and the enthusiastic support of a welcoming community. Don’t miss out on this incredible spring running experience
Organiser's Description
THUMB COAST ULTRA & RELAY APRIL 25, 2026
Thumb Coast Ultra & Relay is a one-of-a-kind spring ultramarathon in Michigans Thumb. On Saturday, April 25, 2026, runners and ruckers will take on the challenge of racing from Lake Huron in Harbor Beach to Saginaw Bay in Caseville in the 50 Mile divisionor team up with friends for the 50 Mile Relay. The 50K features a flat out-and-back course starting and finishing in Caseville.
This race offers the rare opportunity to run point-to-point across the Thumb on mostly dirt and unimproved rural roads. With just 500 feet of elevation gain in the 50 Mile and 300 feet in the 50K, its a course that is both approachable for first-time ultrarunners and fast enough for seasoned athletes looking to chase a personal best. Generous cutoff times allow all participants a chance to achieve their goal, while 50 Mile finishers who beat the sun with a daylight finish earn a unique prize in addition to their medal.
Thumb Coast Ultra & Relay is more than just a raceits a test of endurance, teamwork, and determination supported by a welcoming community. Participants can expect a well-marked course, fully stocked aid stations [https://runsignup.com/Race/ThumbCoastUltra50Mileand50Kilometer/Page/AidStation], and the camaraderie of runners, ruckers, and relay crews tackling the same adventure together.
WHY RUN THUMB COAST ULTRA?
* Unique point-to-point ultramarathon from Harbor Beach to Caseville in the 50 Mile and Relay.
* Flat and fast courses: 500 feet of elevation gain (50 Mile) and 300 feet (50K).
* Relay option: Gather your crew and tackle the 50 Mile as a team.
* Ruck divisions available in both the 50 Mile and 50K.
* Generous cutoff times [https://runsignup.com/Race/ThumbCoastUltra50Mileand50Kilometer/Page/AthleteGuide] to support beginners and seasoned veterans alike.
* Special prize for 50 Milers who beat the sunset at the Caseville finish.
* Well-marked course with excellent aid stations, staffed by an enthusiastic volunteer crew.
* A true spring race experience in Michigans Thumb, just before the busy summer season begins.
Thumb Coast Ultra & Relay is a one-of-a-kind spring ultramarathon in Michigans Thumb. On Saturday, April 25, 2026, runners and ruckers will take on the challenge of racing from Lake Huron in Harbor Beach to Saginaw Bay in Caseville in the 50 Mile divisionor team up with friends for the 50 Mile Relay. The 50K features a flat out-and-back course starting and finishing in Caseville.
This race offers the rare opportunity to run point-to-point across the Thumb on mostly dirt and unimproved rural roads. With just 500 feet of elevation gain in the 50 Mile and 300 feet in the 50K, its a course that is both approachable for first-time ultrarunners and fast enough for seasoned athletes looking to chase a personal best. Generous cutoff times allow all participants a chance to achieve their goal, while 50 Mile finishers who beat the sun with a daylight finish earn a unique prize in addition to their medal.
Thumb Coast Ultra & Relay is more than just a raceits a test of endurance, teamwork, and determination supported by a welcoming community. Participants can expect a well-marked course, fully stocked aid stations [https://runsignup.com/Race/ThumbCoastUltra50Mileand50Kilometer/Page/AidStation], and the camaraderie of runners, ruckers, and relay crews tackling the same adventure together.
WHY RUN THUMB COAST ULTRA?
* Unique point-to-point ultramarathon from Harbor Beach to Caseville in the 50 Mile and Relay.
* Flat and fast courses: 500 feet of elevation gain (50 Mile) and 300 feet (50K).
* Relay option: Gather your crew and tackle the 50 Mile as a team.
* Ruck divisions available in both the 50 Mile and 50K.
* Generous cutoff times [https://runsignup.com/Race/ThumbCoastUltra50Mileand50Kilometer/Page/AthleteGuide] to support beginners and seasoned veterans alike.
* Special prize for 50 Milers who beat the sunset at the Caseville finish.
* Well-marked course with excellent aid stations, staffed by an enthusiastic volunteer crew.
* A true spring race experience in Michigans Thumb, just before the busy summer season begins.
Races
-
Thumb Coast Ultra 50 Mile
Incl. $9.80 Fee & Jacket
Sat 25th April 2026 (6:47AM EDT)
$139.80
-
Thumb Coast Ultra 50 Kilometer
Incl. $8.60 Fee & Jacket
Sat 25th April 2026 (8:30AM EDT)
$118.60
-
50 Mile Relay
Incl. $7.10 Fee & Jacket
Sat 25th April 2026 (6:47AM EDT)
$92.10
-
50 Mile Ruck
Incl. $9.80 Fee & Jacket
Sat 25th April 2026 (5:00AM EDT)
$139.80
Ruckers are hiking with a weighted ruck sack or weight plate carrier and will be weighed prior to the race. Ruckers Under 150 lbs must have a backpack with 20 lbs Ruckers Over 150 Lbs must have a backpack with 30 lbs As the Ruck event will begin prior to sunrise, this category is not eligible for overall or age group awards. Will still be eligible for Beat the Sun. -
50K Ruck
Incl. $8.60 Fee & T-Shirt
Sat 25th April 2026 (7:30AM EDT)
$118.60
Ruckers are hiking with a weighted ruck sack or weight plate carrier and will be weighed prior to the race. Ruckers Under 150 lbs must have a backpack with 20 lbs Ruckers Over 150 Lbs must have a backpack with 30 lbs -
Virtual 50 Mile
Incl. $5.00 Fee & Jacket
$55.00
-
Virtual 50K
Incl. $5.00 Fee & Jacket
$55.00
-
Pacer
Sat 25th April 2026 (6:47AM EDT)
Free
Participate in Running Research
Receive 2 FREE months of run training from our friends at RunDot
The RunDot Project is a research initiative that helps RunDot quantify and enhance the performance gains that RunDot's Optimized Training delivers over training alternatives.
Reviews
Done this event?
First-hand event reviews from people who have been there, done that and got the breathable T-shirt, really help everyone choose their next event.
Add a reviewThumb Coast Ultra & Relay - 50 Mile, 50K, & 50 Mile Relay
