FREE National Park Entrance Days on 9-28-1309/24/2013 6:01 am Get FREE National Park Entrance Days For 2013 for the following days listed belowClick Here for More InfoPartcipating locationsJanuary 21 Martin Luther King, Jr. DayApril 22-26 National Park WeekAugust 25 National Park Service BirthdaySeptember 28 National Public Lands DayNovember 9-11 Veterans Day weekend Latest Freebies