They came from the north. We know this because an artifact made of black obsidian, a type of volcanic glass that can only be obtained north of the Chico river, was discarded in Chorrillo Malo 2.

They were mobile hunter-gatherers, meaning they moved between different places throughout the year. They crossed the Santa Cruz river (very large nowadays), at a time when it had less water than it does today. These first occupations happened immediately after the retreat of the glaciers and would have occurred at a more humid time than today. Their subsistence was based on guanaco.