The book that tells the story is Born to Run: A Hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen. It’s truly inspirational, as is the story told by Will Harlan – he’s in the video – about his encounter with the Raramuri, the Running People.
Of course, the main man is Caballo Blanco. Check out Norawas as well.
Now, where’s my Iskiate?