Rocky Mountain Construction
Private
Founded2001 (age 25)
FounderFred Grubb and Suanne Dedmon
Hq location cityHayden, Idaho
Hq location countryUnited States
Area servedWorldwide
Key people
  • Darren Torr (President/CEO)
  • Jake Kilcup (COO)
IndustryManufacturing and construction
ServicesRoller coasters, water parks, specialty construction
Websitewww.rockymtnconstruction.com

Rocky Mountain Construction (RMC) is an American roller coaster manufacturing and construction company based in Hayden, Idaho, United States. It is best known for its I-Box track and Topper Track for wooden roller coasters. Founded by Fred Grubb and Suanne Dedmon in 2001, it has built over 20 roller coasters. In 2023, it merged with amusement ride manufacturer Larson International.

History

In 2001, Rocky Mountain Construction was established by Fred Grubb and Suanne Dedmon. Fred Grubb previously had experience in the construction industry having worked on custom homes and zoo exhibits. The company has worked on several projects including the construction of roller coasters, water parks, steel buildings, miniature golf courses and go kart tracks.[1]

In 2009 Alan Schilke of Ride Centerline began providing design and engineering work for Rocky Mountain Construction. He previously worked with Arrow Dynamics (later S&S Worldwide) to design Tennessee Tornado, Road Runner Express, and X.[2][3][4] Working with Rocky Mountain Construction, Schilke and Grubb designed the I-Box track for wooden roller coasters.[5] The first installation of this track technology debuted on New Texas Giant at Six Flags Over Texas in 2011.[6]

In late 2011, Schilke announced that the company would be working on two projects throughout 2012 which would both open in 2013.[7] These were later revealed to be an I-Box retrack of The Rattler at Six Flags Fiesta Texas and a new roller coaster designed from scratch at Silver Dollar City named Outlaw Run.[8][9] The track technology used for Outlaw Run, which allows a square beam of wood to be twisted, took 4 years to develop. It allows Rocky Mountain Construction to design layouts with maneuvers that are not traditionally possible with wooden roller coasters such as heartline rolls. Grubb has stated the technology could be used for new elements in the future.[10] Some new elements were realized with the announcement of Goliath at Six Flags Great America. The ride features an 85 degree drop as well as a dive loop and a zero-g stall. The ride opened in June 2014.[11]

In 2013, Rocky Mountain Construction signed a deal with Dutch amusement ride firm Vekoma. The agreement allows Vekoma to sell Rocky Mountain Construction's roller coasters outside the North American market.[12] In 2014, Kolmården Wildlife Park in Sweden announced plans to build the first Rocky Mountain coaster in Europe called Wildfire, which opened on June 28, 2016.[13] To handle increased demand, Rocky Mountain Construction opened a new factory, twice the size of their existing one, in August 2014.[14]

In a press release on April 11, 2023, amusement ride manufacturer Larson International, known for its Fire Ball models, merged with Rocky Mountain Construction.[15]

Technology

  • I-Box Track (also known as Iron Horse Track): Rocky Mountain Construction's most common product. A formation of replacement steel track for wooden roller coasters. The first installation of this track was on Texas Giant at Six Flags Over Texas.[16][17]
  • I-Box (Large Track Version): Specifically designed to run the S&S Free Spin 4D coaster clones.
  • Topper Track: Installed on several coasters around the United States.[18][19][20] The track is designed to reduce the maintenance required for a wooden roller coaster and provide a smoother ride experience.[19][21] This steel track replaces the upper layers of laminated wood.[21]
  • Wooden roller coaster trains: specifically designed to run on the company's own Topper Track, however, they could be added to other wooden roller coasters as well. The trains feature steel wheels as opposed to polyurethane wheels found on most trains.[7][8]
  • 208 ReTrak: Debuting in 2021 on Silverwood's Tremors roller coaster, similar to the I-Box track, 208 is designed to be used as a replacement for sections of old wooden coasters to decrease maintenance and add lifespan to the coaster as well as increase rider comfort and enjoyment.
  • Wild Moose: A version of the classic wild mouse coaster type using I-Box track, featuring entirely redesigned trains and a compact layout.
  • Raptor Track: A single rail steel track that features inline seating for passengers.
  • T-Rex Track: Similar to Raptor track, the T-Rex track is a single rail track. It is a larger single rail model that permits two seat-wide trains on the track rather than one.
  • Swing Axle Trains: Debuting in 2018 on Twisted Timbers, the Swing axle train features a pivoting front axle allowing for smoother transitions between elements.

List of roller coasters

As of January 2026, Rocky Mountain Construction has built or refurbished 29 roller coasters around the world.[22] As of 2026, all of them are currently operating.

NameModelParkCountryConverted FromOpenedStatusRefImage
New Texas GiantI-Box - SteelSix Flags Over TexasUnited StatesTexas Giant2011[23]
[6]
Outlaw RunTopper Track - WoodSilver Dollar CityUnited StatesN/A2013[24]
Iron RattlerI-Box - SteelSix Flags Fiesta TexasUnited StatesRattler2013[25]
[8]
[26]
Medusa Steel CoasterI-Box - SteelSix Flags MexicoMexicoMedusa2014[27]
GoliathTopper Track - WoodSix Flags Great AmericaUnited StatesN/A2014[28]
Twisted ColossusI-Box - SteelSix Flags Magic MountainUnited StatesColossus2015[29]
[30]
Wicked CycloneI-Box - SteelSix Flags New EnglandUnited StatesCyclone2015[31]
[32]
WildfireTopper Track - WoodKolmårdenSwedenN/A2016[33]
[13]
Wind Chaser
Formerly Storm Chaser		I-Box - SteelKentucky KingdomUnited StatesTwisted Twins2016[34]
The JokerI-Box - SteelSix Flags Discovery KingdomUnited StatesROAR2016[35]
Lightning RodTopper Track & I-Box - Wood & steel[36]DollywoodUnited StatesN/A2016
Twisted TimbersI-Box - SteelKings DominionUnited StatesHurler2018[37]
Steel VengeanceI-Box - SteelCedar PointUnited StatesMean Streak2018[38]
Twisted CycloneI-Box - SteelSix Flags Over GeorgiaUnited StatesGeorgia Cyclone2018[39]
Wonder Woman Golden Lasso CoasterRaptor Track - SteelSix Flags Fiesta TexasUnited StatesN/A2018[40]
[41]
RailBlazerRaptor Track - SteelCalifornia's Great AmericaUnited StatesN/A2018[42]
HakugeiI-Box - SteelNagashima Spa LandJapanWhite Cyclone2019[43]
UntamedI-Box - SteelWalibi HollandNetherlandsRobin Hood2019[44]
[45]
ZadraI-Box - SteelEnergylandiaPolandN/A2019[46]
Stunt PilotRaptor Track - SteelSilverwood Theme ParkUnited StatesN/A2021[47]
Jersey Devil CoasterRaptor Track - SteelSix Flags Great AdventureUnited StatesN/A2021[48]
Iron GwaziI-Box - SteelBusch Gardens Tampa BayUnited StatesGwazi2022[49]
Wonder Woman Flight of CourageRaptor Track - SteelSix Flags Magic MountainUnited StatesN/A2022[50]
ArieForce OneI-Box - SteelFun Spot AtlantaUnited StatesN/A2023[51][52]
Wildcat's RevengeI-Box - SteelHersheyparkUnited StatesWildcat2023[53]
Fire in the HoleI-Box - Steel[54]Silver Dollar CityUnited StatesN/A2024[55]
Sköll & HatiRaptor Track - SteelGyeongju WorldSouth KoreaN/A2024[56]
YoYRaptor Track - SteelWalibi HollandNetherlandsN/A2025[57]
Fire RunnerRaptor Track - SteelLost Island Theme ParkUnited StatesN/A2025[58]
Raptor Track - SteelFamily KingdomUnited StatesN/A2027[59]
I-Box - SteelWalibi BelgiumBelgiumLoup-Garou2028[60]

Other projects

Topper Track, no layout changes

Construction

Source:[61]

Repairs

Source:[61]

Miscellaneous

Source:[61]

References

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  2. ^ Retrieved July 8, 2012.
  3. ^ Retrieved July 8, 2012.
  4. ^ "Amusement rides and methods". No. 6523479.
  5. ^ "Rolling Vehicle Track". No. 2011146528.
  6. ^ "NEW Texas Giant Named Best New Ride of 2011". PR Newswire. Retrieved July 8, 2012.
  7. ^ Alvey, Robb & Schilke, Alan (November 16, 2011). "IAAPA 2011 Trade Show Part 3 Orlando Florida Theme Park Review Rocky Mountain Sally". Theme Park Review. YouTube. Retrieved July 9, 2012.
  8. ^ McLean, Mike (January 19, 2012). "North Idaho roller coaster maker expands to accommodate innovations". Journal of Business. Archived from the original on January 24, 2012. Retrieved July 8, 2012.
  9. ^ Retrieved July 8, 2012.
  10. ^ Olson, Devon (2013). Outlaw Run: From Dreams To Screams. Branson, Missouri: YouTube. Retrieved May 18, 2013.
  11. ^ "New for 2014". August 29, 2013. Archived from the original on September 1, 2013. Retrieved August 29, 2013.
  12. ^ "Vekoma rides on". Park World Magazine. November 2013.
  13. ^ Retrieved June 22, 2015.
  14. ^ Grubb, Fred (June 25, 2014). "Fred and Suanne". NewsPlusNotes. Retrieved June 28, 2014.
  15. ^ Gregory, John (2023-04-11). "Coaster firm RMC merging with Larson International - Theme Park Tribune, theme park news". Theme Park Tribune. Retrieved 2023-04-11.
  16. ^ Sandy, Adam (May 2011). "Six Flags turns to Gerstlauer to deliver themed trains". Amusement Today. Retrieved July 9, 2012.
  17. ^ "Steel track for wooden coasters". Park World Online. July 7, 2010. Archived from the original on April 3, 2011. Retrieved July 9, 2012.
  18. ^ Rocky Mountain Construction (October 15, 2010). "Tremors Coaster Topper Track Installation". Photos. Facebook. Retrieved July 8, 2012.
  19. ^ "Georgia Cyclone: A Classic "Woodie"". Six Flags. Archived from the original on November 6, 2013. Retrieved July 8, 2012.
  20. ^ "Two Six Flags Rides Receive "Topper Track" for 2011". NewsPlusNotes. March 7, 2011. Retrieved July 8, 2012.
  21. ^ "Rocky Mountain Construction Company". Coaster-Net. February 16, 2011. Archived from the original on December 6, 2011. Retrieved July 9, 2012.
  22. ^ Rocky Mountain Construction - rcdb.com
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  42. ^ Retrieved June 13, 2012.
  43. ^ Retrieved June 13, 2012.
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  45. ^ "Walibi Holland vervangt Robin Hood door hypermoderne achtbaan" (in Dutch). Looopings. 2018-02-06. Retrieved 2018-02-06.
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  51. ^ Retrieved May 25, 2021.
  52. ^ "Fun Spot America Announces partnership with Rocky Mountain Construction". Fun Spot America Theme Parks. May 25, 2021. Retrieved May 25, 2021.
  53. ^ "Hersheypark Announces New Hybrid Rollercoaster". Retrieved 2023-02-09.
  54. ^ beaver, marketing (2023-09-07). "Fire In The Hole". Rocky Mountain Construction. Retrieved 2024-03-23.
  55. ^ Retrieved June 13, 2012.
  56. ^ Retrieved May 25, 2021.
  57. ^ Retrieved May 25, 2021.
  58. ^ Retrieved May 25, 2021.
  59. ^ Retrieved November 18, 2025.
  60. ^ Retrieved June 1, 2026.
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