The Tarahumara

The Tarahumara are an elusive "stone age" tribe living in the Copper Canyons- the Barrancas del Cobre- commonly described as "super-athletes." They have been said to travel in ninety minutes what a mule might travel in ten hours. They practice the old hunting technique, similar to that used by the Kalahari Bushmen, of relentlessly pursuing their prey until it lays down in exhaustion. This method allows the Tarahumara to catch a deer "with their bare hands."
The Tarahumara are said to possess the secret to a powerful energy food. This has remained a secret because of their remote location in the Barrancas, an area easily comparable to the Bermuda Triangle because of the number of people lost within them. "Canyon Fever" is the culprit for these disappearances; the area is said to feel like a crypt, and people go crazy within it and frequently commit suicide.