The Olympian Hiawatha took scheduled excursions through scenic Idaho, Montana's Bitterroot Mountains, and Washington's Cascade range. On June 29, 1947, the Milwaukee Road inaugurated its streamlined flagship on a 43-hour, 30-minute schedule. This was advertised as being a "speedliner." The railroad contracted industrial designer Brooks Stevens to design the train consist, which included some unique and signature cars of the Milwaukee Road.
In 1952, the first full-length "Super Dome" cars were added, which included 68 dome seats and 28 lounge seats. The dome area featured seats positioned lengthwise, facing the 625 square foot double-pane windows. Ideal for insulation, and sightseeing.
