FREE National Park Entrance Days for 2019 (September 28) Posted On September 23, 2019 The next FREE National Park Entrance Day will be September 28: National Public Lands Day!Here are the FREE National Park Entrance Days For 2019! You can get FREE entry into any of the National Parks on the following days listed below. Available at these participating locations.September 28: National Public Lands Day November 11: Veterans Day