Zip track and system

A track system for a challenge course comprising:

• a puck track having a puck support surface, wherein a puck track opening extends through the puck support surface;
• a zip track having a rotating member support surface which extends between a first end of the zip track and a second end of the zip track, wherein the first end of the zip track is positioned higher than the second end of the zip track;
• and
• a moveable body comprising a puck and a rotating member, wherein the moveable body is displaceable along the puck track and the zip track, with the puck being disposed above the puck support surface when the moveable body is displaced along the puck track, and the rotating member being disposed above the rotating member support surface when the moveable body is displaced along the zip track;
• wherein the puck track overlaps with the zip track through at least a portion of the zip track, such that the puck is disposed above the puck support surface and the rotating member is disposed above the rotating member support surface when the moveable body is moved onto the first end of the zip track.