The $80 pass entitles the pass owner and accompanying passengers (or up to four adults at sites where per-person fees are charged) admittance to more than 2,000 federal recreation areas. Learn more about where you can use the pass and what it covers.
Other kinds of passes include:
Senior Pass -- $10 lifetime pass for U.S. citizens who are 62 years and older
Access Pass -- Free lifetime pass for permanently disabled U.S. citizens
Volunteer Pass -- Annual Pass awarded to volunteers who contribute 500 or more hours
View more details here
http://store.usgs.gov/pass/index.html
