Mike May, who describes himself as “a climbing bum,” gave us a tutorial on slacklining, the sport in which people walk on not-so-tight ropes suspended between trees. The wider 2-inch slacklines are ...

In slacklining, you balance your way across a flat rope, similar to tightrope walking. Yet the difference is in the type of rope and its tautness, which altogether can feel more like a really thin ...

Or more accurately, slacklining — a sport in which users string a wide, flat line between two trees and walk across it. From “highlining” (rigging the line 20 feet in the air or higher) to ...