An apparatus for transporting a rider between two points on a cable or rope, having a plurality of supports configured to suspend the cable or rope between two points of unequal elevation and a trolley for transporting the rider supported by a harness on the cable or rope, the trolley having a mounting plate configured with a connection point to receive the rider's harness, a pulley rotatably mounted to the mounting plate to support the plate on the cable or rope, and a friction shoe mounted on the plate forward of the pulley to contact the upper portion of the cable or rope, wherein the connection point is located beneath the cable or rope between the centers of the pulley and the friction shoe.