Great Smoky Mountains National Park covers 522,427 acres, divided almost evenly between the states of North Carolina and Tennessee. More than 11.3 million recreational visits in 2016. (This figure does not include the approximately 11 million travelers on the Gatlingburg-Pigeon Forge Spur.) Highest visitation of any of the 59 national parks. The second most heavily visited national park is Grand Canyon with 4.6 million visits, third is Yosemite with 3.8 million, fourth is Yellowstone with 3.2 million. You can access multiple reports about park visitation by typing the park's name into the 'Select a park' field at https://irma.nps.gov/Stats/Reports/Park.