I like how you phrased this. Wild how recent the continental migration was.
Tens of thousands of people still regularly walk across continents. The Appalachian trail and pacific trail, for example.
Most do so now supported by the infrastructure of modern society that requires them to carry less than ten days of food with them at any given time. And most of those hikers will travel into towns and cities and take long vehicle rides or even plane rides during their long hikes.