The National Park Service turns 100 years old in 2016 and we want everyone to join the party! On 16 days in '16, all National Park Service sites that charge an entrance fee will offer free admission to everyone.
Mark your calendar for these entrance fee–free dates in 2016:
January 18: Martin Luther King Jr. Day
April 16 through 24: National Park Week
August 25 through 28: National Park Service Birthday
September 24: National Public Lands Day
November 11: Veterans Day