In 1881, 2 young Americans, on a whim, scaled half dome using just a rope and sheer nerve. The cable there
today is evidence of their success. This story is from the book "Sculptor in Buckskin" as told by Alexander
Phimster Proctor. http://www.frontier.net/~merryeye/ours.html
Alden Sampson was my great-great-grandfather.
Id recommend that you start early (5am ish). By noon there is an hour wait to climb the cables (see pics, it was just like that when we went). Nothing takes the wind out of your sails on a pretty day in the outdoors like standing in line!
Is the cables route really 5.4 without the cables ? It seemed way more difficult than that.