Dean Karnazes Is Still Running Big Miles at Age 63. Here’s How He Does It.

May 7, 2026

The man who ran 50 marathons in 50 states in 50 days—and once ran 350 miles without sleep—talks about aging, the evolution of ultrarunning, and why he’s still running toward the horizon.

There was a time when the name Dean Karnazes was synonymous with the impossible. In the mid-2000s, he became a household name not just in the niche world of trail running, but in the mainstream cultural consciousness. He was the man who could run forever, famously fueled by whole pizzas ordered from the road and a physiology that seemed to defy the buildup of lactic acid.

Today, the “Ultramarathon Man” is in his early 60s. The sport he helped popularize has exploded from a fringe hobby into a global phenomenon with professional contracts and live-streamed mountain races. Yet, as the sport changes, Karnazes remains a constant. He still has the same lean, corded muscle and the same relentless drive to see what lies around the next bend. Outside