The National Park Service turns 100 years old in 2016!
Mark your calendar for these free entrance days in the National Parks for 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
Source: National Park Service: Free Entrance Days in the National Parks for 2016.