![Three kids kids exploring stream Three kids kids exploring stream](https://www.nps.gov/findapark/images/DENA_feefree_415x265.jpg)
NPS photo
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