Through 8/27, head over here where seniors over the age of 62 can score a Lifetime Pass for National Parks and Federal Recreational Lands for just $10 + $10 processing fee. The Senior Pass provides entrance or access to the pass owner and accompanying passengers in a single, private, non-commercial vehicle at Federal operated recreation sites across the country.
This lifetime pass may provide a 50% discount on some amenity fees charged for facilities and services such as camping, swimming, boat launch and specialized interpretive services. It can be obtained online, in person at a federal recreation site or by mail using this application form.