Deer Lodge is a city in and the county seat of Powell County, Montana.The city is perhaps best known as the home of the Montana State Prison, a major local employer. Deer Lodge was also once an important railroad town, serving as a division headquarters for the Chicago, Milwaukee, St. Paul and Pacific Railroad ("the Milwaukee Road") before the railroad's local abandonment in 1980.The current Montana State Prison occupies a campus 3.5 miles (5.6 km) west of town. The former prison site, at the south end of Deer Lodge's Main Street, is now the Old Prison Museum. In addition to a former cellblock building, the museum complex includes a theater, antique and automobile museums, and a former Milwaukee Road "Little Joe" electric locomotive