Runaway! (1973 film)

Runaway, also known as The Runaway Train, is a 1973 film made for ABC television directed by David Lowell Rich. It is an action thriller involving skiers trapped on a runaway train speeding down a mountain. The film was produced by Universal.

After departing the train station at a ski facility, a passenger train begins descending a long downhill grade, only to discover that the brakes dont work, apparently frozen while at the mountain station. The train continues to gain speed, and one brakeman is lost trying to kick the frozen moisture off one section of brakes. It is anticipated that the train will derail at a sharp curve once it reaches level ground, and emergency crews stand by there. The train survives the curve and continues on toward the terminal station, where the tracks abruptly end.A last desperate measure is tried a locomotive will join the line after the runaway train passes, chase and latch onto the end of the train, then pull the train to a stop. Meanwhile, a young woman has decided to jump from the speeding train, and a young man tries to talk her out of it. ........

Source: Wikipedia