Did people come to north America before all glaciers were melted?

Yes, people came to North America before all glaciers were melted. The first people to arrive in North America crossed the Bering land bridge from Asia during the last glacial period, when sea levels were lower and the land bridge was exposed. This migration occurred around 15,000 to 20,000 years ago. At that time, much of North America was covered in glaciers, but there were some ice-free areas, particularly in the Great Plains and the Southwest. The first people to arrive in North America lived in these ice-free areas and adapted to the cold climate. As the glaciers melted over time, more people were able to migrate to North America and spread throughout the continent.