64: The Hardest Human Alive, Ultra Runner

Navy SEAL and endurance athlete, David Goggins, joins the Finding Mastery podcast to share his quest to become the hardest human alive.

World's Toughest Races: These Are the Hardest Races in the World

76-year-old prepared to run the world's toughest ultramarathon

Top 5 scariest ultra marathons in the world

Fitness challenges for the new year: long walks, steep hikes - Los Angeles Times

About the Paleo Running Momma

I ran an ultramarathon in the hottest place on Earth

World's Toughest Races: These Are the Hardest Races in the World

Insane world of 'toughest man alive' David Goggins who ran 101 miles in just 19hrs - as his brutal workouts are revealed

I Ran My First Marathon After 55

Inside the Pain Cave With Ultrarunning GOAT Courtney Dauwalter - The Ringer