A Yosemite bowline is loop knot with better security than a bowline. It is a bowline with the free end wrapped around one leg of the loop and tucked back through the knot, a final round turn and reeve commonly known as a "Yosemite finish." When finished, the working end forms a figure eight.
The Yosemite finish can be applied to other bowline variants, such as the double bowline.
While the knot's versatility suggests it as a convenient tie-in for attaching a climbing rope to a climber's harness, the figure-of-eight follow through is the most common choice because it is more widely known and perhaps more easily checked. The Mountaineering Handbook is one of the few texts that suggest that the Yosemite bowline is better for this purpose. Suggested benefits include being easier to untie when wet and frozen, being possible to tie-in with only one hand, and the knot is simpler, allegedly making it easier to inspect. Testing found it a strong knot for the purpose.