The people who lived at Upward Sun River 11,500 years ago were living at the end of the world they had known — or at the beginning of a new one, depending on how one frames the transition from Ice Age to post-glacial.

They were among the earliest well-documented inhabitants of the interior of North America north of the ice, navigating a landscape that was changing around them with a speed that, measured in ecological time, was rapid and disorienting.

They buried their dead with care.

Why The Site Already Mattered

Before the genome of USR1 was sequenced, before the term Ancient Beringian was coined, before the 2018 Nature paper that would make Upward Sun River globally significant in the study of ancient Americans — the site already mattered for reasons that were entirely archaeological.

One of the persistent problems in the study of the earliest Americans is the scarcity of well-preserved, well-documented sites from the critical period of initial peopling and early post-colonization spread.