To visit three National Parks in Three days is a big task! Longer to explore would've been ideal but given our tight time frame and winter weather conditions, three days is what we had. We planned our route to make the most of our time, so that we were seeing sights while still covering some travel distance. The first thing you will need to do is buy an America The Beautiful Pass. This link will take you to the page that helps you plan and decide the best pass for you . For three parks in three days the Annual Pass was the best value for us. We are a family of four, Mum, Dad and two teenagers. The fact that they are teenagers means we often have to pay for for adult entries to any attraction as family passes are for younger children. You can buy your annual pass at the entrance to the park.