Some of the links have changed, and I assume will continue to change occasionally (in particular, the Pacific Crest Trail Association got its own domain). In no particular order: John Muir Trail FAQ ...

If you don't want to hike up the often slippery Mist Trail to Vernal and Nevada falls, you can always take the John Muir Trail, which features vantage points of the falls, as well as fantastic ...

Of all the challenging long-distance thru-hikes in the U.S., few are as difficult as the John Muir Trail. Though hiking trails such as the Pacific Crest Trail or the Appalachian Trail are just as ...