During a 2004 JMT thru-hike, I recorded GPS coordinates of all the trail junctions and camps along the way. It was recorded in UTM coordinates with the NAD-27 datum. I uploaded the Excel spreadsheet into Google Docs. This may be helpful for those trying to hike this trail this year. Unsure if there have been any trail re-routes.
https://docs.google.com/spreadsheets...gid=1758626614