Established: February 26, 1919 Location: Arizona Area: 1,217,403 acres Visitation (2017): 6,254,238 Visitation Increase Since 2000: 40.2% National Park Service Official Website
Established: February 26, 1929 Location: Wyoming Area: 309,995 acres Visitation (2017): 3,317,000 Visitation Increase Since 2000: 28.0% National Park Service Official Website
