The McDermitt Caldera is a large, oval-shaped caldera west of McDermitt in southeastern Oregon and northern Nevada in the United States. It is about 28 miles long north–south and 22 miles wide east–west. The western part of the caldera is in the Trout Creek Mountains, and the northern part is in the Oregon Canyon Mountains. The highest point …The McDermitt Caldera is a large, oval-shaped caldera west of McDermitt in southeastern Oregon and northern Nevada in the United States. It is about 28 miles long north–south and 22 miles wide east–west. The western part of the caldera is in the Trout Creek Mountains, and the northern part is in the Oregon Canyon Mountains. The highest point of the McDermitt Caldera is Jordan Meadow Mountain at 6,816 feet, which is part of the Montana Mountains of Humboldt County, Nevada.