The U.S. National Parks Service has announced its list of days with free admission to all parks for the coming year.
Most parks have no fees for entrance, but about a quarter of them do, ranging from around $20 per person and $35 per car. On the free days, fees for using particular facilities, like campgrounds, remain in place, but the entry fees are waived.
This year's list starts with Martin Luther King's Birthday, celebrated this year on January 16 and continues with the first day of National Park Week, April 22. August 4 marks Great American Outdoors Day, September 23 is Public Lands Day and November 11 is Veterans Day