The National Park Service is waiving entrance fees, so visitors can enjoy all 392 national parks for free April 17-25.
April 17-25. Parks will also offer additional family-friendly activities and special offers on tours, lodging, food, and souvenirs. Visit the Web site for a listing of parks and promotions. There will be hundreds of family friendly events on Saturday, April 24, for National Junior Ranger Day. Each child participating in Junior Ranger activities will receive a certificate, patch, or pin.
Click this link for more information