John Muir Trail Thru-Hike w/ Off Road Pursuits, DirtyRunning & EnduranceGuy. This is a record of our attempt to hike the entire JMT, southbound from Yosemite to Whitney Portal in 9 days. Follow us on the adventure if you'd like!. Follow along online. The MapShare site shows the progress of someone tracking with an inReach satellite communicator. Read messages they have sent to MapShare. You can even reply.