The Appalachian trail is hiking trail in the Eastern US stretching from the mountains in Georgia all the way to Maine.
Have you ever hiked it?
No, but at least over 2 million people are said to have hiked it. 
I've been on it for about an hour, but that's the extent of my experience with it.
Wow, thats crazy, I didn't know it was longest hiking only trail in the world.
Yes, it sure is. It's beautiful too. I've only been on it in Georgia.
ooo so you were in the Springer Mountain of Georgia ?
Yes, about 10 years ago. I went in October and the leaves changing colors were spectacular.
Springer Mountain
Springer Mountain is a mountain located in the Chattahoochee National Forest on the border of Fannin and Gilmer counties. Located in the Blue Ridge Mountains in northern Georgia, the mountain has an elevation of about . Springer Mountain serves as the southern terminus for the Appalachian and Benton MacKaye trails.
Name.
The origin of the name of Springer Mountain is unclear. One possible origin was that it was named in honor of William G. Springer, an early settler appointed in 1833 by Governor Wilson Lumpkin to implement legislation to
Appalachian Trail
The Appalachian National Scenic Trail, generally known as the Appalachian Trail or simply the A.T., is a marked hiking trail in the Eastern United States extending between Springer Mountain in Georgia and Mount Katahdin in Maine. The trail is about long, though the exact length changes over time as parts are modified or rerouted. The Appalachian Trail Conservancy describes the Appalachian Trail as the longest hiking-only trail in the world. More than 2 million people are said to take a hike on part of the trail at least once