Arrowhead 135: Minnesota's subzero ultra-marathon
The Arrowhead 135 is recognized as one of the 50 toughest races in the world, and it got even tougher this week as Minnesota braces for its coldest temperatures in nearly 25 years.
The Arrowhead 135 is recognized as one of the 50 toughest races in the world, and it got even tougher this week as Minnesota braces for its coldest temperatures in nearly 25 years.