For close to 46 days in a row, champion ultramarathoner Karl Meltzer ran an average of 47 miles. He ran over 6,000-foot mountains, across rivers, through thick underbrush, and over bridges.

"There is nothing fake in that thing at all," Karl Meltzer told me last week when we talked about his documentary, "Karl Meltzer: Made to be Broken," now available on Netflix. The real deal. That's ...

In commemoration of the 150 year anniversary of the Pony Express, ultra-marathoner Karl Meltzer actually RAN THE WHOLE TRAIL. Yes, Meltzer ran 2,064 miles in just over 40 days, averaging out to ...

Sorry, this video could not be played. The night before Karl Meltzer decided to gut out the last 85 miles without a break on a grueling 2,190-mile trail run journey ...

Last summer trail runner Karl Meltzer was helping the legendary Scott Jurek attempt to set a new supported speed record on the Appalachian Trail (AT), urging him along to set a record that Meltzer ...

The record hike comes after two other speed hiking attempts by Meltzer, in 2008 and 2014. Other members of his crew, including his father, Karl Sr., his wife and other ultrarunners, joined Meltzer ...

Karl Meltzer, 49, hiked his own hike from Maine to Georgia, drinking beer and eating bacon along the way. He also moved at a blistering pace, covering the 2,190 miles of the Appalachian Trail in ...