By comparison, experienced climbers have often rappelled hundreds or thousands of times, but an unfortunate number of us also seem to be randomly involved in rappelling accidents. In these cases, preventative practices like knotted rope ends, using backups, and a system of careful double-checks were often overlooked or ignored, even though the value of these techniques is undisputed.

In this article, we hope to create a resource for novice climbers to understand what rappelling is, the contexts in which it happens most commonly, and a set of principles that should govern the rigging. We also hope to address any reader that may be well into their rappelling career. Perhaps some will find reasons to adopt practices that they have historically ignored, or revise the practices they are currently committed to using regularly. In some cases, this article may simply validate what a reader is already doing, but in that case we hope it might also give them a vernacular for communicating with their friends, students, and mentees.

What is rappelling?

To put it most simply, rappelling is just lowering your own mass down a climbing rope. In belaying, the belayer remains stationary and the rope moves. In rappelling, the rope remains stationary, there is no belayer, and the rappeller is the thing that is moving.

Once a climber has rappelled a few times, these distinctions seem painfully obvious. But, as thousands of climbing instructors will attest, until a person has experienced the fundamental difference between being lowered and rappelling, it’s not obvious at all. A rappeller has independence, agency, and control in a way that a person being lowered does not. That can be advantageous, but it also means that rappellers sometimes lose the advantages and redundancy of team work.

There are two main variations to rappelling mechanics: fixed-line rappelling and counterweight rappelling. In fixed line rappelling, a climbing rope is connected to an anchor, the rope remains stationary, and the rappeller can rappel all the way down to the other end of the rope. In counterweight rappelling, a climbing rope is not fixed. Instead the rope runs freely through a rappel station, set of carabiners, or around an object. In this arrangement, a rappeller must capture both strands of rope within the rappel in order to counterweight around the rappel anchor point, and the rope can be retrieved from below.