About one-third of American ski and snowboard resorts have strung ziplines to keep the mountain thrills going through the summer.
Hundreds of thrill-seekers hook up and slide every offseason, choosing from full-speed rides (60 mph in some cases!) to more leisurely flights using hand brakes. Many combine with suspension bridges and other aerial challenges for a tour. Most ziplines have age and height restrictions – and require parents or guardians for youngsters.