Not exactly a Long Distance Challenge, more of a long term one, but interesting reading none the less.

Kilian Jornet's new project:

http://www.summitsofmylife.com/en/

A couple of short video clips here:

http://www.summitsofmylife.com/en/films

And an English summary of the concept here:

http://www.summitsofmylife.com/en/philosophy

Also an article on iRunFar here:

http://www.irunfar.com/2012/05/kilia...f-my-life.html

Fascinating!