If you plan to visit other national park units with an entrance fee, the following passes are available to waive those fees. Also several times throughout the year there are fee-free days. Check here for those dates in 2015.
Various America the Beautiful - National Parks and Federal Recreational Lands Passes can be purchase in the Seattle's National Park Store which adjoins our visitor center. This Interagency Pass program covers recreational entrance fees for National Park Service, USDA Forest Service, Fish and Wildlife Service, Bureau of Land Management and Bureau of Reclamation lands.
All types of payment will be accepted for purchasing passes.