When I was a boy scout (so 16 -18 yo) we were walking as a team 50-70 km per day and could sustain that for 2-3 days. More perhaps, but there was nowhere to go

When I was a boy scout (so 16 -18 yo) we were walking as a team 50-70 km per day and could sustain that for 2-3 days. More perhaps, but there was nowhere to go any further. We were wearing 20 kg in rather uncomfortable backpacks. On forced marches we could keep 7-8 km/h speed. And sometime we have practiced legionary walk which is alternating 200 steps jogging and 700 steps walking. One of the badges was for walking 100 km in a day and lot of my friends got it. But back then we were generally walking a lot, day by day, every year. Good shoes and good motivation. I am not doing this anymore.