The National Park Service currently sells a lifetime access pass to US citizens and permanent residents age 62 years or older for only $10. This access pass allows entry to more than 2,000 federal recreation sites including national parks. Annual passes currently cost $80 for so the lifetime pass for seniors offers an incredible value.
The cost of the lifetime pass is expected to increase later this year so best to purchase now if you qualify. Click here for details on how to purchase the lifetime access pass and for a list of federal recreation sites.