I don't think any of your pictures of Pilot Knob are actually pictures of the Pilot Knob in the John Muir Wilderness or of Humphreys Basin for that matter. This one picture above sort of looks like it has Mt. Humphreys in it (the one on the right) but the geology in your pictures is all wrong for this to be the John Muir Wilderness' Pilot Knob. Humphreys Basin and its surrounding mountains are all granite not sandy (as your pictures show) in any way except for around some lakes. I don't mean to shoot you down but I don't want anyone being mislead.