A melting pot of the world's best trail runners, the Ultra-Trail du Mont-Blanc® is widely regarded as the most important and most demanding trail event in the world.
Every year, tens of thousands of enthusiasts from all walks of life descend on Chamonix in France to be part of the festivities.
And 2019 is no different. With a record 25, 678 runners applying to be part of the event this year – an increase of 3, 978 from last year.
"It's a "must do" if you like trail running," says On athlete David Hauss, a former Olympian and European triathlon champion, who returns to compete in the CCC after a strong showing in the same event last year, finishing 14th.
"The atmosphere before the race is electric. And on Sunday afternoon, when you're waiting for the last runners, it's just absolutely crazy in the little picturesque streets.”