Obviously, this is very personal and varies from person to person and place to place. I'm trying to figure out a realistic distance my son and I can hike in a day. Seems like the average hiker is around 10-15ish. I would like to cover more ground than that. We are leaving Harper's Ferry next week heading north, 3 days, two nights. I am 42/m, he is 13/m, both very fit (marathoner, obstacle course racing, etc). In my mind, I was planning 20 mile days, but after more research, it looks like the average is only half that?