I am hoping to get the time off of work next year to do a JMT thru hike. I frequently hike the AT for days or weeks at a time but never did western hikes other than Alaska day hiking. On the AT I average 15 mpd or just over due to getting late starts. When trying to figure out the time I need to complete the JMT I was wondering what kind of mpd in those mountains is equilivant to 15-18mpd AT hiking. In Alaska I had done over 23 mpd two days in a row but elevation was minimial. Any help on this would be much appreciated.