Race: Ragnar Trail Relay, Northfield, Mass.
The Race: A two-day, around-the-clock trail relay, in teams of four or eight, for a total of 122 miles. It's equal parts camping — hammocks, fires, and guitars — and all-hours trail running. "Everyone thinks they'll sleep, but no one really does," says Ragnar vet Rob Goyen. "I was once woken by a man wearing a Speedo and a chef's hat, handing out tacos."
When: June 26 and 27
The Place: The forested trails of Northfield Mountain in western Massachusetts. (The relay takes place in 10 other locations, too.)
Don't Miss: Mountain biking in Pisgah State Park, just across the border in New Hampshire.