Before you can start exploring, you’ll need to buy a park pass. The most common park passes can be purchased online and printed out before your visit. You can also buy a pass on arrival to the park, but it’s a good idea to check the map ahead of time, as not all passes are available at every park entrance. There are also some special passes for kids, seniors, active military members and veterans, and visitors with disabilities. Credit cards are accepted and preferred at all fee locations.