Katmai National Park and Preserve is a United States National Park in southern Alaska, notable for the Valley of Ten Thousand Smokes and for its brown bears. The park covers 7,383 mi² (19,122 km²), being roughly the size of Wales. Most of this is a designated wilderness area, including 5,288 mi² (13,696 km²) of the park. The park is named after Mount Katmai, its centerpiece stratovolcano.