Hayden Valley and the caldera rim in the distance Elevation 10,308 feet (3,142 m) at Mount Sheridan Location Wyoming , Montana , Idaho - U.S. Range Rocky Mountains Coordinates 44°24′N 110°42′W﻿ / ﻿44.4, -110.7 Topo map USGS Yellowstone National Park Type Caldera Age of rock 70,000 – 2.1 million years Last