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River King Mine Train

Steel Mine Train at Mid America Adventure, Eureka, Missouri. Opened 1971.

By Theme Park Spot · Last reviewed November 8, 2026

Height
32 ft
Drop
41 ft
Top speed
37 mph
Length
2,349 ft
Inversions
0
Ride time
3 min
Designer
Arrow Dynamics

River King Mine Train is a steel mine train roller coaster in the Gateway to the West area of Mid America Adventure in Eureka, Missouri, the park called Six Flags St. Louis until 2026. It opened with the park in June 1971 and runs through twists, dips and a tunnel, with three chain lift hills.

Arrow Dynamics built the ride as two mine train coasters side by side. It was called River King Run-Away Mine Train from 1972 to 1983. In 1984 the park fitted stand-up trains and renamed it Rail Blazer, making it one of the first stand-up roller coasters, but problems with those trains led the park to put the original trains back after that season and restore the River King Mine Train name. RCDB lists the second track as removed after the 1987 season.

The park gives a top speed of 37 mph and a track length of 2,349 feet. RCDB lists a height of 32 feet, a 41-foot drop and a ride time of 3 minutes.

Sources

  • midamericaadventure.enchantedparks.com/rides-and-experiences... (Park page: classic family coaster with twists, tunnels and dips; top speed 37 mph, length 2,349 ft; Gateway to the West; introduced 1971; Arrow Development; minimum height 48 in.)
  • rcdb.com/125.htm (RCDB: operating since June 1971; Arrow Dynamics mine train; length 2,500 ft, height 32 ft, drop 41 ft, 37 mph, 0 inversions, duration 3:00; three chain lifts and a tunnel; former names River King Run-Away Mine Train (1972 to 1983) and Rail Blazer (1984); opened as two side-by-side mine trains; stand-up trains used in 1984 only.)
  • rcdb.com/587.htm (RCDB: the second River King Mine Train track, operated June 1971 to 1987 (standing but not operating in 1988), now removed; length 2,349 ft.)

Numbers are from the ride's manufacturer and park where published; "n/a" means we have not confirmed that number yet. Spotted an error? Tell us.