Here’s an older YouTube post from Salomon Running following Kilian Jornet around. If you haven’t seen this one Kilian gives some trail running tips to get you up and down faster. I found it funny how he cuts switchbacks, as we all know is a big no no in the US. Why? Well will the heavy use on most trails this can lead to severe erosion and degradation of the trails, oh, and rangers can give you ticket for it!
Anyway check it out: