The Appalachian Mountain Club (AMC) is a nonprofit organization dedicated to the protection, enjoyment, and understanding of the outdoors in the northeastern United States. Founded in 1876, AMC is the oldest outdoor group in the U.S. and focuses on conservation, education, and recreation, offering activities such as hiking, paddling, and skiing. They generate revenue through membership fees, donations, grants, and the operation of lodges, huts, and campsites. AMC's historical significance includes its role in trail building and environmental advocacy, making it a key player in regional conservation efforts.