There are several days each year in which entrance fees are waved at the National Parks, the April event is coming up. April 22-26 is National Park Week, and admission fees are waved.
Other fee-free days are:
- August 25 – National Park Service Birthday
- September 28 – National Public Lands Day
- November 9-11 – Veterans Day weekend
For more information, check out the National Park Services site.
Note: Other fees such as reservation, camping, tours, concession and fees collected by third parties are not included unless stated otherwise.