You’ve missed this freebie, but you’ll find all of the Freebies here. Celebrate opening weekend of National Park week and enjoy free entrance on April 19 & 20 in the National Parks. More than 100 national parks that usually charge admission will be free on these days. Did you know that 268 of the 401 national parks NEVER charge an entrance fee? If you are active duty military, you and your dependents qualify for the FREE Annual Pass program America the Beautiful National Parks and Federal Recreational Lands Pass.