Runaway Mine Train, Steel roller coaster at Six Flags Over Texas in Arlington, United States

Runaway Mine Train is a steel mine train roller coaster in the Boomtown section of Six Flags Over Texas in Arlington. Its entrance has a red sign reading "SIX FLAGS" and "MINE TRAIN" above dark red metal beams and dark wood. The track uses tubular steel rails, with three lift hills and two tunnels, and the ride car is brown with a white stripe and the number 3.

The coaster opened in 1966 as the world's first mine-themed roller coaster, creating an entirely new design category. This pioneering approach influenced how amusement parks would later develop adventure-themed rides with similar underground mine concepts.

The ride draws from Old West mining themes that fit with the park's broader frontier aesthetic. Visitors experience this story through the tunnels and forest sections that suggest an escape from an underground mine.

The ride tends to have longer waits during peak season and warm weather days when the park is busiest. Visiting early in the day or during quieter seasons helps you experience the coaster with shorter lines.

The final drop plunges into a 150-foot (46 m) tunnel curving beneath the park's Caddo Lake, described as the world's first underwater coaster tunnel. The ride has two tunnels in all, and its old-style Arrow cars use lap bars released only by hand.