THIS. Back when, I walked to/from kindergarten & elementary school daily. In pretty much whatever weather there was. Usually alone. Mostly along a main-ish residential street. Those walks added up to ~12 miles/week. Pretty much all the other kids at my school did the same; I'd guess the maximum walk was ~15 miles/week.

(Also - this was back when all the kids went home to eat lunch each day, then came back to school. "School lunch" for the few oddballs, who had no housewife mom available, amounted to a few folding picnic tables in a dead-end hallway, and BYO sack lunch.)