Today, the National Park Service celebrates its 100th birthday! For 100 years, our parks have proved again and again why they are America's "best idea." Not only do they provide opportunities for people from around the country and world to immerse themselves in beauty and rich heritage of our natural resources, but they work diligently to protect and preserve those resources for the future. To celebrate, every National Park is inviting you to visit for free from Augus 25-28! This is the perfect opportunity to visit that park you've always wanted to visit or hike that TRACK Trail you've been dreaming of.