| Creates | A loop mid-rope |
| Loadable | In any direction |
| Used for | Isolating damage, glacier travel |
| Difficulty | Intermediate |
The alpine butterfly is a knot that puts a secure, load-bearing loop in the middle of a rope without needing the ends. Climbers use it to isolate a damaged section of rope, to tie into the middle of a rope on a glacier team, and to clip a third climber into the system. It can be loaded in any direction.
Why it’s special
It stays secure pulled from either end or the loop — ideal for glacier rope teams where the load direction changes.
Key uses
Tying middle climbers in, clipping a third person, and isolating a worn rope section out of the load path.
Good to know
One of the most useful mid-rope knots; see all climbing knots.
Frequently asked questions
What is an alpine butterfly used for?
It creates a strong loop in the middle of a rope, used to tie middle climbers into a glacier rope team, to clip in a third person, and to isolate a damaged or worn section of rope so it can still be used safely.
Can you load an alpine butterfly in any direction?
Yes — that's its key strength. Unlike some mid-rope loops, the alpine butterfly remains secure whether pulled from either end or from the loop itself, which is exactly what's needed for glacier teams where the pull direction varies.
How do you isolate a damaged rope with it?
You tie the alpine butterfly so the damaged section sits within the isolated loop, taking it out of the load path. The rope can then bear weight on the sound strands while the bad spot is protected inside the knot.
Sources
- Glacier travel and rope skills — American Alpine Club