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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| 50 Mile Ruck | 50 Mile | Apr 24, 20275:00 AM | $160$170 after Nov 2, 2026 | – |
| 50 Mile Relay | Relay | Apr 24, 20276:27 AM | $100$110 after Nov 2, 2026 | 384 |
| Pacer | – | Apr 24, 20276:27 AM | $10 | – |
| Thumb Coast Ultra 50 Mile | 50 Mile | Apr 24, 20276:27 AM | $160$170 after Nov 2, 2026 | 325 |
| 50K Ruck | 50K | Apr 24, 20277:30 AM | $135$145 after Nov 2, 2026 | – |
| Thumb Coast Ultra 50 Kilometer | 50K | Apr 24, 20278:30 AM | $135$145 after Nov 2, 2026 | 200 |
| Virtual 50KVirtual | 50K | Apr 24, 2027 | $55 | – |
| Virtual 50 MileVirtual | 50 Mile | Apr 24, 2027 | $55 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The 50 Mile fee goes up to $170 on Nov 2, 2026.
Online registration closes Apr 23, 2027, unless the race fills first.
Sunrise on race morning is at about 6:36 AM, and the 50 Mile Ruck starts at 5:00 AM. The start sits about 600 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
6400 Main St, Caseville, MI 48725
The pin marks the address the race lists, which is usually the start. Course maps are the organizers' own.
Aggregated from official results (Trivium Racing) for Thumb Coast Ultra & Relay - 50 Mile, 50K, & 50 Mile Relay. Individual finisher names are not stored here.
At the 2026 Thumb Coast Ultra 50 Mile, the fastest tenth finished in 8:21:47 or better, the top quarter in 9:09:10, and half the field in 10:35:54; the last tenth came in after 12:42:03.
At the 2026 Thumb Coast Ultra 50 Kilometer, the fastest tenth finished in 4:34:29 or better, the top quarter in 5:23:37, and half the field in 6:31:08; the last tenth came in after 8:44:17.
At the 2026 50 Mile Relay, the fastest tenth finished in 7:06:26 or better, the top quarter in 7:51:11, and half the field in 8:29:33; the last tenth came in after 9:56:54.
| Age | Women | Men |
|---|---|---|
| 20-29 | 8:56:57 | 8:31:42 |
| 30-39 | 8:57:55 | 7:42:19 |
| 40-49 | 10:34:32 | 9:38:23 |
| 50-59 | n/a | 11:34:52 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
Where a finish time would have placed in 2026.
Down 34 percent since 2024.
All events combined, from official results.
From 2024 to 2026, the field went from 190 to 110 finishers, and the median time rose from 10:34:29 to 10:35:54.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 110 (+5%) | 10:35:54 | under 8:21:47 | 6:17:54 |
| 2025 | 105 (-45%) | 10:52:21 | under 8:35:14 | 7:00:10 |
| 2024 | 190 | 10:34:29 | under 8:20:44 | 6:24:56 |
From each year's official results for the 50 Mile; virtual options are left out.
Faster than most US 50-mile races
The fastest quarter of the 2026 50-mile race field finished under 9:09:10, against 9:47:37 in a typical US 50-mile race, so times here run 7 percent faster.
Compares the fastest quarter of each field, so walkers and first-timers do not skew it. It reflects the course and the field together: a flat course, cool weather, or a competitive crowd all make times faster.
Around April 24 the day usually runs from 39°F at dawn to 57°F in the afternoon, with measurable rain on about 35% of days. Cold snaps dip to 31°F and hot years reach 71°F.
Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
What the organizers of Thumb Coast Ultra & Relay - 50 Mile, 50K, & 50 Mile Relay cover on their registration page, in brief.
Schedule and packet pickup
This is a cup-less event. You will be provided a collapsible cup at packet pick up to use at the aid stations if you will not be using your own hydration source. Note: Aid Stations locations and options available may change slightly due to…
Schedule and packet pickup
We will have a bag check area at the start of both races and at the packet pick up on Friday, April 23rd. A bag to use for bag check will be provided to all athletes at check in. For security reasons, this is the only bag that will be…
Schedule and packet pickup
Mandatory Virtual Pre Race Athlete Meetings. You must attend one of three clinics, Date and times TBA. Relay teams, please designate one-two members to attend. Friday, April 23rd. Packet Pickup at Thumb Brewery, 2pm-7pm: 6758 Pine St…
Course
50 Mile Ultra & 50 Mile Relay teams will run a point-to-point course starting in Harbor Beach, Michigan and finishing in Caseville, Michigan! The 50 Mile course is point-to-point, starting at sunrise in Harbor Beach, Michigan and finishing…
Course
This out-and-back course starts and finishes on the beach at Caseville County Park. The course uses mostly unimproved and gravel roads. With ~220' of elevation gain it's a fun, fast race! Course Map. Click here to view the course on…
Course
We’ve created a custom map in Google My Maps that shows the course, aid stations & exchange points, and the intended driving routes between them. Crew, spectator, and Relay team vehicles supporting the relay MUST follow the alternative…
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Thumb Coast Ultra & Relay – April 24, 2027
Thumb Coast Ultra & Relay is a one-of-a-kind spring ultramarathon in Michigan’s Thumb. On Saturday, April 24, 2027, 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 division—or team up with friends for the 50 Mile Relay. The 50K features a flat out-and-back course starting and finishing in Caseville.