Top-rope and lead: where the rope runs.

Two ways the rope can run

Wikipedia's overview of climbing defines two ways of running the rope:

Top-rope

The climber is below a rope that is already anchored above the route, so a fall leaves them hanging on the rope.

Lead

The climber takes the rope up from below and clips it into protection on the way, and that protection is what holds them in a fall. In competition, lead is climbed on bolted routes.

On a sport route the lead climber clips bolts; on a trad route the leader places removable protection, as the BMC (British Mountaineering Council) describes it. The American Alpine Club (Ron Funderburke, first printed in Accidents in North American Climbing 2016, web page 19 June 2023) calls belaying the core skill behind nearly all roped climbing, and describes the belayer's role as holding, lowering or catching the climber and managing the rope.

Why lead is treated as a separate step

The same AAC article says lead belayers often learn only part of the skills they need before using them, and that this can lead to accidents. It points to maker instructions and to the AAC's Gold Standard curriculum for instructors. The training schemes and instructor awards below also treat lead as its own stage.

Petzl, a maker, defines fall factor as the length of a fall divided by the length of rope between belayer and climber. We saw the Petzl article only in a search summary, so its wording is unconfirmed. It is a definition of a term, not a way of judging any real fall.

Is top-roping free climbing?

Sources do not agree on how to classify top-rope climbing:

• Wikipedia's Climbing article does not count top roping as free climbing.
• A commercial online-class explainer files it under aid climbing.

The disagreement is about labels, not about what happens on the rock.

Headpoints

The two methods meet in one ascent style. Gripped Magazine (Aaron Pardy, 7 July 2024) defines a headpoint as a lead after rehearsing the route on a top-rope, a term it says is used mostly for bold trad routes.

Auto belays

Indoors, a machine can take the belayer's place on a top-rope. Wikipedia describes an auto belay as a mechanical device on indoor walls that lets one person climb a top-rope route without a human belayer. It says a lead auto belay, mounted at the base of the route, appeared in 2021. Wikipedia also lists EN 360:2002 (retractable fall arresters) and EN 341:2011 Class 1A (descender devices) as the standards auto belays are made to; that has not been checked against the standards body or a maker. The auto belays page in the safety section covers what bodies publish about them.

How schemes and awards separate the two

Climber schemes and instructor awards draw the line between top-rope and lead explicitly:

Wall operators' codes also address roped climbing. The US Climbing Wall Association's Industry Practices include client top-rope and lead belay tests as facility practices. The UK Association of British Climbing Walls' Code of Practice says only competent users may climb roped routes unsupervised, that novices need supervision by a competent person, and that instruction must be given by an appropriately qualified instructor. The learning and guide certification page covers these schemes in more detail.