Blake's Hitch

Arborists spend entire working days ascending and repositioning on a single climbing line, and that repeated use pushed tree-climbing rope-access technique toward a friction hitch built specifically for rope-on-rope contact rather than the thin accessory cord a rock climber's prusik typically uses. Blake's hitch, tied directly in the climbing rope itself, grips reliably under a full body weight through repeated ascents in a way that's held up as the standard in modern arborist climbing systems.

Its construction spirals four wraps upward around the standing part, then brings the working end back down behind the rope and threads it up under the bottom two of those wraps, so the tail emerges in the middle of the hitch - the arrangement usually written as the 4/2. That tuck under the lower two turns is the whole hitch, and describing it loosely is how it gets tied wrong: the end does not simply pass back down through the middle of the coils. It is a more elaborate wrap-and-tuck sequence than the prusik's simpler repeated coils, but one that arborists have found grips more predictably specifically when both the hitch cord and the rope it grips are the same or similar rope, rather than thin cord on thick rope.

Because it's typically tied directly in the working climbing line rather than a dedicated separate cord, wear inspection matters more here than with a prusik tied in disposable accessory cord - any fraying or glazing at the hitch's wrap points is a genuine safety concern that arborists are trained to check for as part of routine gear inspection.

Its adoption has been largely specific to professional tree-climbing and rope-access work rather than general mountaineering, where the prusik and its variants remain the more universally taught default - Blake's hitch is a genuine, still-used specialist tool rather than a broadly general-purpose friction hitch.

The hitch is named for Jason Blake, an American arborist credited with popularizing it within the tree-care industry, and it spread through arborist training programs largely by word of mouth and hands-on apprenticeship before appearing in written climbing manuals - a documented but relatively recent addition to knot practice compared with hitches whose origins trace back centuries.

One practical detail that distinguishes it in daily arborist use: because it's tied in the same rope the climber ascends and descends on, rather than a separate cord, it can be untied and retied quickly at a new position on the tree without needing to carry or manage a second piece of gear - a genuine efficiency advantage over a system that requires a dedicated prusik loop, though it does mean the hitch itself takes slightly longer to dress correctly each time compared with simply clipping a pre-tied prusik loop onto the rope.