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Thunder Run
Thunder Run Kentucky Kingdom edit.jpg
Kentucky Kingdom
Coordinates 38°11′44″N 85°44′51″W / 38.19556°N 85.74750°W / 38.19556; -85.74750Coordinates: 38°11′44″N 85°44′51″W / 38.19556°N 85.74750°W / 38.19556; -85.74750
Status Operating
Opening date August 1990 (1990-08)
General statistics
Type Wood
Manufacturer Dinn Corporation
Designer Curtis D. Summers, John Fetterman
Model Custom
Lift/launch system Chain lift hill
Height 90 ft (27 m)
Drop 74 ft (23 m)
Length 2,850 ft (870 m)
Speed 53 mph (85 km/h)
Inversions 0
Duration 1:54
Height restriction 48 in (122 cm)
Trains Single train with 6 cars. Riders are arranged 2 across in 2 rows for a total of 24 riders per train.
Thunder Run at RCDB
Pictures of Thunder Run at RCDB

Thunder Run is a wooden roller coaster at the Kentucky Kingdom amusement park in Louisville, Kentucky. The ride originally operated from August 1990 through to October 2009, when then-operators Six Flags abandoned the park. After remaining closed since 2009, Thunder Run reopened in May 2014 when Kentucky Kingdom reopened under new operators.

The ride was manufactured by Dinn Corporation and designed by Curtis D. Summers and John Fetterman. With 2,850 feet (870 m) of track, Thunder Run stands 90 feet (27 m) tall and features a top speed of 53 miles per hour (85 km/h).


Kentucky Kingdom opened on May 23, 1987, leasing 10 acres (4.0 ha) at the Kentucky Exposition Center property. The Texas investors who operated the park filed it for bankruptcy after only one season of operation. The Ed Hart-led Themeparks LLC firm purchased the rights to operate the park in 1989, reopening the park the following year. As part of the reopening the new operators added a collection of new rides including Thunder Run, which opened in August 1990. Early in Thunder Run's operating life, one of the cars uncoupled while climbing the lift hill and the ride's lap bars were found to be unsafe. No injuries were reported from these incidents. The original ride was retracked by Martin & Vleminckx prior to its closure in 2009.

Thunder Run operated until the end of the 2009 season which ended on November 1. On February 4, 2010, amid a corporate bankruptcy, Six Flags closed the park due to the rejection of an amended lease by the Kentucky State Fair Board. Eventually, on June 27, 2013, a group of investors led by Ed Hart negotiated an agreement to reopen the park with a planned investment of $50 million. Rocky Mountain Construction was hired to refurbish the coaster, resulting in replacement of the existing wooden track. On October 10, 2013, Kentucky Kingdom invited members of the media and amusement industry to ride the refurbished Thunder Run. The ride reopened to the public on May 24, 2014. After the 2016 season, Kentucky Kingdom announced that Thunder Run would receive a new train from the Philadelphia Toboggan Company for the 2017 season. This train replaced the single train that was first put into service in 1990.


The 2,850-foot-long (870 m) Thunder Run stands 90 feet (27 m) tall. With a top speed of 53 miles per hour (85 km/h), the ride featured a ride duration of approximately 2 minutes. The ride operates with a single train featuring six cars. Each car seats riders in two rows of two, totalling 24 riders per train. Thunder Run features 70 degree banked turns.

Thunder Run's design was originally intended for Americana Amusement Park. In 1986 John Fetterman presented the design to park manager Ron Berni. Berni contacted Dennis Starkey of Curtis D. Summers's engineering firm. The coaster was never built for Americana and Berni transferred to Kentucky Kingdom in 1989.

The design was later used as the foundation for the International Coasters' roller coaster located at Carowinds and Kings Dominion named Hurler.

Ride experience

Thunder Run at Six Flags Kentucky Kingdom 10
People riding Thunder Run in 2009

Thunder Run features a double out and back layout. It begins with a left turn out of the station. This leads to the 90-foot-tall (27 m) chain lift hill. Once at the top, riders go down a small dip and along a 180 degree turn to the left. The first drop of 74 feet (23 m) leads into a near-ground level 70-degree banked turn to the left. A series of small camelback hills are followed by a turnaround. The train proceeds back towards the station with another hill. This process repeats a second time leading back into the brake run and station.

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