This is the 4th Autumn in a row I've walked the corridor trails in Grand Canyon. My youngest son joined me this time. We descended BA in 4.5hrs, spent the night at Phantom Ranch, and climbed out the S.Kaibab (also 4.5hrs) the next day. I think I enjoy it more every time...the mule leavings really aren't much of a problem. BTW my son brought his one day old DSLR camera....the better pictures are his!