http://www.appalachiantrail.org/home...r-registration
Go to the registration page and select a start date. Hit “Go.”
Pick where you would like to begin your hike and click the box that corresponds with the date you would like to begin your hike.
Then click “REGISTER ONLINE.”
That should bring up the page where you enter your contact information. Your arrival date should be the date you want to begin your hike.
I just tried the website and it seems to be working just fine.