The National Park Foundation (NPF) is the official charity of the United States' National Park Service (NPS) and its 418 national park sites.[1] The NPF was chartered by Congress in 1967 to "further the conservation of natural, scenic, historic, scientific, educational, inspirational, or recreational resources for future generations of Americans" according to their slogan.[2] The NPF raises private funds for the benefit of, or in connection with, the activities and services of the National Park Service.[3]