What is it like to run the southernmost trail of the world?In December 2016, Jess Young and Eduardo Donoso set out to tackle Dientes de Navarino - a 30 mile trekking circuit in the extreme south of Chilean Patagonia. Less than 200 people attempt the circuit a year, most often as a 5 day backpacking trip. Many don’t finish. Their goal was to complete the circuit ultra-light style - running - in one long day. A surprise up in the mountains turned their straightforward, albeit lofty, goal upside-down.