Failure is an Option: On the trail of the world's toughest mountain race

'We're not at parkrun any more, ' I mutter to myself, quietly longing for the presence of nice marshals in high-visibility vests.

Failure is an Option is the story of an average runner who sets out to discover just how far he can go. With the support (and misgivings) of his family, and aware that his quickest years are behind him, Matt Whyman leaves the Saturday morning 5K to push towards 100-mile ultramarathons and beyond. By slowing things down to run a very long way, he joins a growing nu...