America's Best Idea, our National Parks, is even better when it's free. To kick off the opening weekend of National Park Week, all 405 national parks will offer FREE admission on April 18 and 19.

National Park Week, America's largest celebration of national heritage, is April 18–26, 2015. The opening weekend, this Saturday, April 18 and Sunday, April 19, will allow you to enjoy our national beauty admission free. For more information about National Park Week, visit