Highlining is the coolest sport that you’ve never heard of… until now.

Few people will experience highlining themselves. It requires you to be strong physically with incredible athleticism, balance, stamina to walk a long line. But you also must be strong mentally – even just to attempt getting on the line.

This all-new series takes viewers inside the world of these fearless athletes, who live every day like it could be their last. What answers are they searching for out on that line?

While what they do on the line is wild, their life together off the line can be crazier. For 30 days, cameras captured some of the top heavy-hitters of the sport.

The crew will set new lines or attempt new stunts every week in some of the beautiful and challenging locations in the American West – including Moab’s iconic Fruit Bowl, where a line is strung 500-feet above the desert floor. The team will also climb the 400-foot Castleton Tower to string lines from one ledge to the next and take on the Colorado Rockies where they’ll attempt to break the US record with the highest kilometer walk in history.