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
Established: October 27, 1986 Location: Nevada Area: 77,180 acres Visitation (2017): 168,028 Visitation Increase Since 2000: 107.3% National Park Service Official Website
Established: September 13, 2004 Location: Colorado Area: 42,984 acres Visitation (2017): 486,935 Visitation Increase Since 2000: 86.7% National Park Service Official Website
