“Each spring, the National Park Service and the National Park Foundation invite everyone to celebrate National Park Week. From April 16 – 24, you are invited to celebrate all that America’s more than 400 national parks have to offer. And in honor of the National Park Service Centennial this year, all parks are offering free admission the entire week. From diverse wildlife and iconic landscapes, to vibrant culture and rich history, our National Park System has something for everyone. “
Just passing this along. Best time to visit national parks is when they are free!