There are only two people to have completed every mile ever run on the Grandma's Marathon racecourse --- John Naslund and Jim Nowak. Together, they're known as "The Iron 2," and both will be back this year trying to complete their 47th trip from Two Harbors to Duluth.

Already, they've each accumulated more than 1,200 miles on the Grandma's Marathon racecourse, and each is a past recipient of the race's 1,000-Miler Award.