national park service

"The fee waiver includes entrance fees, commercial tour fees, and transportation entrance fees. Other fees such as reservation, camping, tours, concession and fees collected by third parties are not included unless stated otherwise." https://www.nps.gov/planyourvisit/fee-free-parks.htm

"Mark your calendar for these entrance fee–free dates in 2016: January 18: Martin Luther King Jr. Day April 16 through 24: National Park Week August 25 through 28: National Park Service Birthday September 24: National Public Lands Day November 11: Veterans Day" https://www.nps.gov/planyourvisit/fee-free-parks.htm

"Tuesday, August 25 is the National Park Service's 99th birthday, and in celebration of this event, all parks that are part of the national park service (over 400) will have no entrance fee. Most parks don't usually have an entrance fee, but there are over 100 that do, most of them being the well-known national [...]

Mark your calendar for these entrance fee-free* dates in 2015: January 19 Martin Luther King Jr. Day February 14-16 Presidents Day weekend April 18-19 opening weekend of National Park Week August 25 National Park Service Birthday September 26 National Public Lands Day November 11 Veterans Day http://www.nps.gov/findapark/feefreeparks.htm

"America's Best Idea - the national parks - is even better when it's free! Mark your calendar for these entrance fee-free* dates in 2014: January 20 Martin Luther King Jr. Day February 15-17 Presidents Day weekend April 19-20 opening weekend of National Park Week August 25 National Park Service Birthday September 27 National Public Lands [...]