As a teenager I did this hike in the early 2,000’s, with my uncle.. he’s recently developed Parkinson’s. I’d love to see it again or at least something before he gets any worse. For the most part, if you’re going.. the entirety of this trail could take over a week to complete start to finish. You can start on the backside up Whitney if that’s your goal. But, It passes though many different parks and the environment changes, there are bears and wildlife. You need a Garcia can, I believe they introduced them around the late 90’s.. Makes packing a pain. There are no restrooms (you will be 100’s of miles from anything). Best part is playing that Disk-man. Don’t take your pack off, lock your knees, or forget sunblock… and be prepared, Happy trails!