Prior to contact with western nations the region of Alaska was occupied by numerous and diverse aboriginal people. Going further back in history archaeologist currently hold to the following:
5000-3000 Years ago- Humans inhabit the Bering Sea Coast
6000 years ago- The most "recent" migration across the Land Bridge. Earliest migrations may have taken place 20,000 years ago.
11000-6000 Years ago- The first people groups inhabit Southeastern, Aleutians, Interior, and Northwestern, Arctic of Alaska