I’ve been leading hikes and backpack trips for more than a decade, and it didn’t take long for me to realize that most of my hikers were older than I’d expected. We’d have a few people in their 20s, then a big gap, then a whole lot of people in their 50s. And 60s. And 70s. It eventually dawned on me why: people in their 20s have fewer commitments and more time to play. Same with people who are done raising kids and are reaching retirement age.