on flat land (not madeira) on average i get 35 miles a day on foot, and i discovered when i did that skipping over railway sleepers i was able to do it for 16 hours a day, for a week, my main food was lard slathered over tiny bits of scavenged bread

oh yeah, slathering my feet with lard helped too, because my shoes at the time made my feet damp

this was in serbia, and someone saw me at one point doing this and said "this is what the old people do"

i had no idea, but i'll just add this data point to your map