4 ms·

~3mph assumes modern equipment and infrastructure. You won't get that with poorly designed shoes, a poorly designed backpack, on a barely beaten trail, and with

~3mph assumes modern equipment and infrastructure. You won't get that with poorly designed shoes, a poorly designed backpack, on a barely beaten trail, and without a grocery store with (very) cheap food at every other street corner. And even if you imagined all of that, it's only less than 9 months when you're goal driven: you'd want to get a message from the east coast to the west coast - fast. Without such a goal, you're just looking at the spread of hearsay through word of mouth - which is slow.

Retric 10y ago
Shoes are over rated. https://en.m.wikipedia.org/wiki/Persistence_hunting https://en.m.wikipedia.org/wiki/Persistence_hunting involved ~(16 to 22 mi) in under 5 hours @ 104+ degree temperatures. Don't forget hunter gatherers had minimal equipment all it takes is for someone to decide to follow the setting sun and they can make the trip. Water and mountains are the major issues not so much food.