To run an ultra is to embrace the agony of it—and for many, it's this suffering that fuels their obsession. https://on.natgeo.com/2FTrzZt

To run an ultra is to embrace the agony of it—and for many, it's this suffering that fuels their obsession. https://on.natgeo.com/2FTrzZt 

https://twitter.com/NatGeoTravel/status/1089010059881971715