Iron Mountain

City, seat (1891) of Dickinson county, southwestern Upper Peninsula of Michigan, U.S., 52 miles (84 km) west of Escanaba. Settled in 1879 and incorporated in 1889, it was named for its proximity to a bluff heavily stratified with iron ore. In the 1930s underground mining became uneconomic, but the industry has revived with open-pit mining and the pelletizing of ore. Tourism and winter sports (based