My baby brother (we're 14 years apart, and I did change his diapers, thank you very much!), and his friend Jon are hiking the Appalachian Trail, the whole thing!
They're blogging periodically, via cell phone post (I think), when service is available.
You can visit their blog here, if you like. http://atdaveandjon.blogspot.com/
These days, hiking from the basement (laundry) to the second floor (where most of it goes) is a pretty good hike for me, but I'm learning and having fun following their journey. "Trail Magic, " for example, is a new term to me, meaning when someone provides food on the trail for the hikers. Often this is done by past "Thru-Hikers," or people who have already hiked the whole trail themselves. They provide meals and other treats for those doing the trail now.
They left a month ago, and plan to be home sometime near the end of the summer. I wish I had done more of this sort of thing when I was younger...maybe when the kids are grown:-)