Three runners face a road that disappears into the Atacama Desert. Windows cracked. Dust stifling. The Valle de la Luna pulls them further in.

Between 2,000 and 4,000 meters, the body recalibrates. New systems emerge to meet high sun and dry air. These are systems built to shield, breathe, and hold through the lengthening days and chilling nights of summer. 

In these extremes, it's gear and grit that decide how long they keep moving through this stage, and the ones to come.