A Yosemite bowline is a very secure loop knot and is a version of the Bowline with the free end wrapped around one leg of the loop and tucked back through the knot, commonly known as a "Yosemite finish."
In addition to being more secure than a standard bowline, the Yosemite variant is also easier to untie after a load. Climbers often make use of the advantages it offers over other knots in using the knot as an alternative tie-in to the Figure Eight, and to secure heavy loads such as haul bags.
The only downside to the Yosemite Bowline is that it is more difficult to visually inspect than the Figure Eight. It was a Yosemite Bowline that was used by Lynn Hill in France, which failed, due most likely to being improperly tied, causing her to careen 70 feet to the base of the climb. Be sure to practice the Bowline many times before trusting it with your life.
Yosemite Bowline Knot Tying Instructions
- Lay the rope across your left hand with the free end hanging down. Form a small loop in the line in your hand.
- Bring the free end up to and pass through the eye from the under side (the rabbit comes out of the hole) and wrap line around standing line (around the tree).
- Feed line back down through the loop (the rabbit goes back down the hole).
- Wrap tag end around it