Each pass covers entrance fees at lands managed by the National Park Service and US Fish & Wildlife Service and standard amenity fees (day use fees) at lands managed by the US Forest Service, Bureau of Land Management, Bureau of Reclamation, and US Army Corps of Engineers. Free Interagency Passes are available for 4th graders, senior citizens, US military families, and individuals with permanent disabilities. Find program details and park locations on their website.
(202) 208-6843
nps.gov/planyourvisit/passes.htm