who were they?
They were the first peoples who entered, and subsequently inhabited, the Americas during the final glacial episodes of the late Pleistocene period
Paleo-Indians
Paleo-Indians, Paleoindians or Paleo-Americans, were the first peoples who entered, and subsequently inhabited, the Americas during the final glacial episodes of the late Pleistocene period. 
when was the last time crater lake volcano erupted Approximately 7,700 years ago what is the name of the volcano? Mount Mazama where is it located? In the state of Oregon, United States how many people live in this state? The United States Census Bureau estimates that the population of Oregon was 4,217,737 on July 1, 2019 who were the early settlers here? Paleo-Indians
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Paleo-Indians [SEP] Introduction
Paleo-Indians, Paleoindians or Paleo-Americans, were the first peoples who entered, and subsequently inhabited, the Americas during the final glacial episodes of the late Pleistocene period. The prefix "paleo-" comes from the Greek adjective "palaios" (παλαιός), meaning "old" or "ancient". The term "Paleo-Indians" applies specifically to the lithic period in the Western Hemisphere and is distinct from the term "Paleolithic". Traditional theories suggest that big-animal hunters crossed the Bering Strait from North Asia into the Americas over a land bridge (Beringia). This bridge existed from 45,000 to 12,000 BCE (47,000–14,000 BP). Small isolated groups of hunter-gatherers migrated alongside herds of large herbivores far into Alaska.