Roundtop, in southeastern Pennsylvania, opens its Vertical Trek May 1. The trek is a series of zip lines that enable participants to descend over 600 vertical feet. Zip liners take a chairlift ride to the top of the mountain to start and then cascade down the mountain over treetops hanging by a harness from a metal zip line.

The trek down features a dual zip line. Some lines are 40 feet above the ground and cover a distance of more than 400 feet. There are rope bridges, a Tarzan swing, cargo nets, and a scenic walks on the way down the mountain.

Zip lining is not for the faint of heart. Participants must be able to climb nets and ladders and walk over rugged wooded terrain. They also must be at least 10 years of age and weigh between 70 - 250 pounds.

Treks are conducted several times a day at 10 and 11 a.m., noon, 1, 2, 3 4 and 5 p.m. rain or shine except for lightning and thunder storms. Guests are required to arrive 30 minutes in advance of the start time for instruction and a safety briefing. No refunds are given for those who decide not to complete the trek.   

Roundtop requires all zip liners to sign a release waiver. Reservations can be made online and are recommended.

More Information. Or call 717-432-9631