At approximately 2,190 miles, the Appalachian Trail is the longest single unit of the National Park System. With the number of people who enjoy this place each year, the potential exists that any of us may inadvertently damage the natural environment along the Trail and affect the experience for others. These negative effects can be minimized by adopting sound hiking and camping techniques which, while simple to learn, require a conscious and committed effort. If we are successful, the Trail will retain its essential natural qualities and continue to be a place where an extraordinary outdoor experience is available. Everyone’s help is important. Please do your part by committing to these practices, and encourage others to learn about and adopt these techniques which “Leave No Trace” on the Appalachian Trail.