The Barkley Marathons is a mysterious ultramarathon held every year in a state park in eastern Tennessee. Runners have to complete five loops of a 20-mile course that most say is really 26 miles, ...

The 129th Boston Marathon happens Monday, April 21. But there’s another 26.2-mile race happening on Saturday, and the course loops through the city. Boston Mayor Michelle Wu called 26.TRUE the “real” ...