Established: January 26, 1915 Location: Colorado Area: 265,828 acres Visitation (2017): 4,437,215 Visitation Increase Since 2000: 39.3% National Park Service Official Website
Established: October 14, 1994 Location: California Area: 91,440 acres Visitation (2017): 946,760 Visitation Increase Since 2000: 26.1% National Park Service Official Website
