April 16th-24th is National Park Week, which means you can visit any National Park for free. Here is a schedule of events from the National Park Service. 

Please notice that April 16th is National Junior Ranger Day, you can rest assured that this guy will be taking part!

April 16–24: Visit for free!
Throughout National Park Week in 2016, every national park will give you free admission!

April 16: National Junior Ranger Day
Explore, Learn, Protect! Kids can take part in fun programs and earn a junior ranger badge or become a Centennial Junior Ranger.

April 22: Earth Day
On Earth Day, if you want to roll up your sleeves and pitch in with a project, look for a park where you can help out.

April 23: National Park Instameet
Join an InstaMeet in a park. Gather in a designated place at a specific time to take photos and short videos to post on Instagram (and other social media) with the same hashtag: #FindYourParkInstaMeet, #FindYourPark, #EncuentraTuParque, #NPS100

April 24: Park Rx Day
On Park Rx Day, parks will host fun recreational activities that encourage healthy lifestyles and promote physical and mental well being. (Looking to host your own event? Download A Guide to Planning Your Own National Park Rx Day Celebration