If you're not familiar with the Appalachian Trail or would just like to learn more about it go to:
Wikipedia's entry for the Appalachian Trail
For more detailed information, check out:
The Appalachian Trail Conservancy at:
www.atconf.org
The Appalachian Long Distance Hikers Association at:
http://aldha.org
If you'd like to contact Karl Ritter, his e-mail address is:
batsAThike@gmail.com
That's "bats" (his trail name) "AT" (Appalachian Trail) "hike" (self-evident)