A couple years ago I got in a fraction of what they are doing. My now pathetic streak was mainly a mental challenge. Neither of these guys seems shaken yet and I'm in awe as each day passes.
http://hikearizona.com/apple.php
After a hundred days it looks like I could maybe hang with Dave on Squaw on his third ascent



Of course, some of that can be blamed on the kind of company they're keeping, getting dragged into the GC on day hikes and such.... 




