I am always amazed at the number of people, over 62, that are not aware of the National Park Life Time Pass or Senior Pass. For a one time $10 fee any person over 62 can get a Senior Pass that allows free access to all US National Parks, Monuments, Refuge, or forest that has an access fee. You have to purchase on site at a National Park, Monuments, Refuge, or forest entrance. For walk in sites it allows 3 other people (no age limit) to enter with you. For drive in it allows your vehicle to enter. If you are over 62, and like to travel, it is the best $10 you can spend.