Rogaining. Invented in Australia, popular in a few countries in Europe, and does exist in the US too. This is my local organisation: https://sarogaining.com.au/
The 24-hour events are the majors (state/national/international championships) but they also have 6-15 hour events plus 3-hour urban events for newcomers/families. Plus a cycling version. The 6 hour events are usually in pine forests with logging/walking trails so can suit rookies as well.
Two of my kids (9yo and 6yo) and I won the family category last year (no other family entered the 24 hour event! ;)) in our state championships. 40km in 24 hours. I let them sleep from 11pm until 6am, though to be honest my ankles needed the rest too.
It's not all brawn either. People stay competitive into their 70s. Mixed or female teams are always at or near the top. Some 13yo girls came second in one 6hr event a few years back (they just ran the entire time but got beaten by semi-pro marathon runners). You can finish near the top by walking quickly or trotting, but picking a good route, being careful with map and compass, etc - no one characteristic wins the 24 hour events.
The 24-hour events are the majors (state/national/international championships) but they also have 6-15 hour events plus 3-hour urban events for newcomers/families. Plus a cycling version. The 6 hour events are usually in pine forests with logging/walking trails so can suit rookies as well.
Two of my kids (9yo and 6yo) and I won the family category last year (no other family entered the 24 hour event! ;)) in our state championships. 40km in 24 hours. I let them sleep from 11pm until 6am, though to be honest my ankles needed the rest too.
It's not all brawn either. People stay competitive into their 70s. Mixed or female teams are always at or near the top. Some 13yo girls came second in one 6hr event a few years back (they just ran the entire time but got beaten by semi-pro marathon runners). You can finish near the top by walking quickly or trotting, but picking a good route, being careful with map and compass, etc - no one characteristic wins the 24 hour events.