What does it take to complete the most difficult adventure race in the world? The Barkley Marathons!

John ‘Random Forest Runner’ Kelly is one of the 15 people to have ever finished the brutal challenge, since it began in 1986.

In this article, John tells us:

• The way he approaches failure

• How he manages his time between family, a job and mega-challenges

• Running training tips and the kit and nutrition he uses