X Im!possible
Backyard Ultra

X Uetli and X-Bionic are proud to present
the first edition of one of the toughest Backyard Ultras in the world.
6.706 km with ~380 m of climb. Every hour. Until only one runner remains.

A challenge open to everyone — whether you aim for a couple of loops
or want to push deep into your limits.
Brutal. Beautiful. And waiting for you in Zurich.