You can get into over 100 national parks for free on Saturday: What to know

(NEXSTAR) — Of the more than 400 sites overseen by the National Park Service, slightly more than 100 charge an entrance fee. For one day this weekend, none of those parks will require you to pay to get in.Every year, the National Park Service waives the entrance fee at the 107 parks that charge one in honor of a significant day.
One such day already occurred this year: January 20, Martin Luther King, Jr. Day (a second, unplanned free day was on January 9, the National Day of Mourning for P