GPS track from our 2010 yoyo - came down on the JMT, returned on Mist trail, where the GPS lost a few points, but you can still see where the turnaround point is - we took a photo right at the big sign and went back up.
link to full screen. in case I forgot how to do html in this forum (it doesn't work in the preview mode)
http://www.mappingsupport.com/p/gmap4.php?q=http://didnt.doit.wisc.edu/outdoor/muir2009/gps/2010/filtered/20100710.gpx&t=t2
