It is believed that around this time the “Clovis People” begin finding their way into southern Alberta. The leading theory on how they arrived here suggests that they made their way across Beringia (a now submerged land bridge) that joined northern Asia to Alaska. As the huge glaciers that covered Canada began receding southward, these hunter-gatherers followed to be the first residents of Canada. As time passed, they were believed to have migrated further into the remainder of the Americas. However, recently there is both Genetic and Archaeological evidence that indicates that these settlers may originated from a location that was south of the ice sheet.
SOURCES & OTHER REFERENCE
https://www.scientificamerican.com/article/the-first-americans/