How have these indoor spaces have become hubs for the outdoor community? Over the last four decades, climbing has gone from a countercultural activity that took place entirely on natural rock walls to a highly competitive sport that, for the most part, happens inside. And yet, the scene a climbing gym very different than what you find in a yoga studio or spinning class. There’s something special about roping up, even if there’s a ceiling over your head. We dispatched our intrepid producer, Maren Larsen, to spend 16 hours straight in a popular Denver climbing gym to understands what exactly keeps people coming back.

The Outside Podcast is made possible by Outside+ subscribers. Learn about the many benefits of a subscription and sign up now at outsideonline.com/podplus.