At the heart of ” Born to Run” lies a mysterious tribe of Mexican Indians, the Tarahumara, who live quietly in canyons & are reputed to be the best distance runners in the world; in 1993, one of them, aged 57, came first in a prestigious 100-mile race wearing a toga & sandals. A small group of the world`s top ultra-runners (and the awe-inspiring author) make the treacherous journey into the canyons to try to learn the tribe`s secrets & then take them on over a course 50 miles long. With incredible energy & smart observation, Mc Dougall tells this story while asking what the secrets are to being an incredible runner. Travelling to labs at Harvard, Nike, & elsewhere, he comes across an incredible cast of characters, including the woman who recently broke the world record for 100 miles & for her encore ran a 2:50 marathon in a bikini, pausing to down a beer at the 20 mile mark.