Rock CF Thumb Coast Marathon, Half Marathon & 5K

Port Austin, MI | Sunday, November 8, 2026Registration Open

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.

Available Distances

Awards & Prizes

Awards + Timing

All finishers will receive a finisher's medal. Overall and age group awards listed below will be presented on a rolling basis throughout the event. Additional awards include: Marathon: The top 3 men, women & non-binary overall, along with the top 3 men and women in each of the following age groups: 14 and under, 15-19, 20-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-69, 70-74, 75-79, 80 and over will receive awards. Half Marathon: The top 3 men, women & non-binary o

Participant Giveaway

26.2 Miles: Crewneck

13.1 Miles: Crewneck

3.1 Miles: Crewneck

Registration & Pricing

Distance	Price	Opens	Closes
26.2 Miles	$115.00	Jan 1	Jul 7
	$130.00	Jul 8	Sep 7
	$140.00	Sep 8	Nov 8
13.1 Miles	$95.00	Jan 1	Jul 7
	$100.00	Jul 8	Sep 7
	$105.00	Sep 8	Nov 8
3.1 Miles

Past Results

5K

Year	Finishers	Median Time	Fastest Time
2025	152	35:42	19:36

Marathon

Year	Finishers	Median Time	Fastest Time
2025	204	4:11:04	2:37:40

Half Marathon

Year	Finishers	Median Time	Fastest Time
2025	377	2:08:37	1:19:16

Course Information

5K Run/Walk Course

Aid Stations

Half Marathon Course

Marathon Course

Interested in this race?

Parking + Start & Finish Locations

Start Lines Marathon: Caseville Harbor Office 6:00-7:45am Half Marathon: Sleeper State Park 6:00-8:15am 5K: Port Austin Welcome Center 6:30-8:45am Finish Line All distances finish in downtown Port Austin on Lake Huron Circle Tour (M53). Parking We recommend using shuttles to the Marathon and Half Marathon start lines if you don't have someone dropping you off. Learn more about shuttles here. If you park at either Port Austin State Harbor or Sleeper State Park, you'll need a State Recreat

Schedule of Events

Pre-Race Meetings Rock CF Thumb Coast Marathon - Pre-Race Information Meeting: https://youtu.be/gj8wmwU2sDs Early Packet Pick Up Saturday November 7: Port Austin Welcome Center ( 2 W Spring St. Port Austin, MI 48467 ) 12:00pm-7:00pm Race Day Packet Pick Up and On-Site Registration TBD Race Day Schedule Marathon Start: 8:00am Half Marathon Start: 8:30am 5K Start: 9:00am Course Cutoff: 2:00pm All races finish at the Port Austin Welcome Center (2 W Spring St., Port Austin, MI 48467)

What's Included With Your Registration

Regular Rock CF Thumb Coast Marathon Registration Includes: Custom Thumb Coast Marathon crewneck sweatshirt ( Deadline to guarantee sweatshirt size is October 29, 2026) Finisher medal Race photography Use of on-course aid stations Marathon & Half Marathon pacers Post race food and drinks Chip timing by Trivium Racing Economy Registration Includes: Skip the swag; save some cash! Custom Thumb Coast Marathon crewneck sweatshirt Finisher medal Race photography Use of on-course aid stations Marat