The White Pine Thaw Marathon Relay starts in Comstock Park, Michigan, on the southern most section of the Fred Meijer White Pine Trail. It's held annually on the second Sunday of March. Competitors form teams of runners and on race day, will each take a leg of the relay, covering 13.1 miles, north to Russel Road, where the course returns back south to Comstock Park. There are easily accessed parking lots and bathrooms, roughly every four miles. The trail is routinely plowed by Friends of The White Pine Trail and covers very few low traffic crossroads.