Ryan Heffernan
Runners descend a steep and windy dirt road in the Copper Canyon Ultra Marathon.
Ryan Heffernan
Maria Juliana leads a group of Tarahumara Indians on a trail run outside the town of Urique.
Ryan Heffernan
Caballo Blanco (Micah True) crosses the river during the first leg of the Copper Canyon Ultra Marathon.
Ryan Heffernan
Tarahumara run the 51-mile ultra marathon in huaraches, sandals made of tire tread and leather straps.
Ryan Heffernan
A Tarahumara wearing traditional clothing runs along the road.
Ryan Heffernan
Foreign runners rest their legs after the punishing 51-mile race.
Ryan Heffernan
A panoramic view of the Copper Canyon from Bahuichivo, Mexico.
Ryan Heffernan
A group scouts the course two days before the race.
Ryan Heffernan
A Tarahumara runner rests after the race.
Ryan Heffernan
An Urique resident watches the race.
