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The Rock CF Thumb Coast Marathon, Half Marathon, and 5K

Sun November 2, 2025 Port Austin, MI 48467 US Directions

Parking + Start & Finish Locations

Start Lines
MARATHON: Caseville Harbor Office 6:00am- 7:45am
HALF MARATHON: Sleeper State Park 6:00am- 8:15am
5K: Port Austin Welcome Center 6:30am- 8:45am

 

All Distances Finish at Port Austin Welcome Center (2 W Spring St., Port Austin, MI 48467)

 

Parking:

If you are choosing to park at either Port Austin State Harbor or Sleeper State Park, these are state parks so to enter the state park you will need a State Recreation Passport (good at all parks all year) upon arrival. This money will be collected at the gate if you do not already have one, but it's cheaper and easier to enter to get it ahead of time!

Marathon

Parking for the Rock CF Thumb Coast Marathon is limited, as shuttles from the Port Austin finish line will be the main point of travel to the marathon start line. If parking is necessary and you do not plan to use a shuttle, please utilize the city streets of Caseville that are NOT on the marathon course. You can also park at the Caseville High School, but the lot will close at 7:30am, 30min prior to race start. Vehicles will not be able to leave here until the last runner passes through. There are NOT post-race shuttles back to Caseville.

Link to course map: https://www.strava.com/routes/3368246681751080544


Half Marathon

The main point of travel to the Half Marathon start line at Sleeper State Park are the shuttles from Port Austin (finish line). If parking is necessary and you do not plan to use a shuttle, limited parking is available at Sleeper State Park in the North and South lots along M25. There are NOT post-race shuttles back to Sleeper State Park.


PLEASE NOTE: If you are parking at Sleeper State Park, please be aware that a Michigan State Recreation Passport or purchase of a Day Use Parking pass from the DNR is required. If you do not have a Michigan State Recreation Passport, day passes can be purchased on-site.


Link to course map: https://www.strava.com/routes/3367687172697826164

 

5K Run/Walk

You may utilize any of the public parking along the roads of Downtown Port Austin that are not utilized on course. Please do NOT park on M25 (Spring Rd) or Lake St as this is part of the finish route for all courses.


PLEASE NOTE: If you are parking at Port Austin State Harbor, please be aware that a Michigan Recreation Passport or purchase of a Day Use Parking pass from the DNR is required. If you do not have a Michigan Recreation Passport, day passes can be purchased on-site. 


Link to course map: https://www.strava.com/routes/3408526415637349076

 

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