On May 25, 2026, U.S. citizens can enjoy free entry to 11 popular national parks, including the Grand Canyon in Arizona, as part of the National Park Service's (NPS) annual fee-free day program. This initiative coincides with Memorial Day, a time to honor those who served in the U.S. military. The participating parks are among the most visited in the country, typically generating millions in entrance fees. To qualify for free entry, U.S. residents must present a valid government-issued photo ID at park entrances. However, international visitors aged 15 and older will still be subject to a $100 surcharge in addition to regular admission fees, as established by a new pricing policy. This fee-free day is part of the NPS's broader effort to enhance public access to national parks and raise awareness of America's natural and cultural heritage.