National Park Service Announces Free Entry Days for 2021 Each year, the National Parks Service (NPS) announces a select number of days when admission fees to all United States National Parks are free. Here are the six days this year that are free: Monday, January 18th – Martin Luther King Jr. Day Saturday, April 17th – Beginning of National Park Week Wednesday, August 4th – First anniversary of the […] Liam Abbott | January 11, 2021 0 Comments