
Rock CF Thumb Coast Marathon, Half Marathon & 5K is a running race on November 8, 2026 in Port Austin, MI, with entry fees from $23 to $115.
From the Organizer
The Rock CF Thumb Coast Marathon, Half Marathon & 5K is back on Sunday, November 8, 2026. This second year event offers a flat, fast, fully paved, USATF-certified course stretching across Michigan’s beautiful Lake Huron coastline. The Marathon is a Boston Qualifier, and both the Marathon and Half will include pace teams to help you hit your goals. Starting in Caseville and finishing in downtown Port Austin, this point-to-point race delivers the perfect combination of speed, scenery, and small-town charm. Whether you’re chasing a PR, running your first race, or planning a fall race-cation, the Rock CF Thumb Coast Marathon has it all.
Events
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
48°
Typical Low
35°
Based on US Climate Normals data from Port Austin Wwtp, 1 mi from the venue.
Host City
City Elevation
639 ft
Nearest Airport
MBS
MBS International Airport · 64 mi
Major Hub
DTW
Detroit Metropolitan Wayne County Airport · 126 mi
Time Zone
Eastern Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at Rock CF Thumb Coast Marathon, Half Marathon & 5K, put it on the calendar, and turn “someday” into a start date.
108
Days to train
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From Endurance Grid
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
Port Austin Run and Walk
2 miles away
Laker 5k Run/Walk and 1/4 Mile Kids Fun Run
20 miles away
Storm the Beach
21 miles away
Cheeseburger 5K
15 miles away
Plan your trip
Coming from out of town? There's more to Port Austin than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.
Plan your trip to Port AustinFrequently Asked Questions (FAQs)
Rock CF Thumb Coast Marathon, Half Marathon & 5K
Nov 8, 2026