If you have a fourth grader in your family, you can sign up for the Every Kid in a Park pass and the whole family gets free admission to all national parks for the whole year. The fourth grader will need to complete an “adventure diary” in order get the pass, and be sure to print it and take it with you, since they will only accept printed copies. The pass is valid through August 31st, 2018 (see complete rules).
Find out the details here. Thanks, Carole!