Your junior ranger adventure can start right here. Junior Rangers are typically between the ages of 5 to 13, although people of all ages can participate. Get your free Junior Ranger book at the King Salmon and Brooks Camp visitor centers or download it here and get started! Follow the steps on the first page to complete your Junior Ranger book. You can turn in your book at either the King Salmon or Brooks Camp visitor center to have it checked by a park ranger who will then swear you in as an official Junior Ranger. If you are unable to visit either of these locations, don’t worry; you can mail your book into the park to be checked by a ranger! If completed properly (have an adult double check your work) a ranger will sign your certificate and mail you a Junior Ranger badge that you can wear with pride. If you’re looking for a bonus adventure, use the video below to become officially sworn in by a Katmai National Park Ranger!