Before there was Unstoppable (2010), or Runaway Train (1985), there was Runaway!, Universal Pictures made for TV Movie that aired on ABC's Movie Of The Week back on September 29, 1973.

It is an action thriller involving skiers trapped on a runaway train speeding down a mountain.

The Denver & Rio Grande Western's Ski Train equipment and Rio Grande locomotives were utilized in the filming. The Ski Train served the Winter Park, Colorado ski resort area west of Denver, Colorado. Rio Grande locomotives were relettered for fictional Sierra Pacific.

Full Cast:
Ben Johnson Holly Gibson
Ben Murphy Les Reever
Ed Nelson Nick Staffo
Darleen Carr Carol Lerner
Lee Montgomery Mark Shedd (as Lee H. Montgomery)
Martin Milner John Shedd
Vera Miles Ellen
Ray Danton Professor Jack Dunn
Frank Marth Dispatcher
Bing Russell Fireman
John McLiam Conductor
Lou Frizzell Brakeman
Frank Maxwell Chief Dispatcher
Kip Niven College Man
Laurette Spang Coed

Quality of video not the best, but watchable.