Firebird is a floorless roller coaster located at Six Flags America in Prince George's County, Maryland.

On April 28, 1990, Iron Wolf opened at Six Flags Great America on the former site of Z-Force (the only Intamin Space Diver ever manufactured).

[19] Iron Wolf closed on September 5, 2011,[7] and work began on preparing it for transport to its new location.

[1][27] On August 16, 2018, the park announced on their social media platforms that Apocalypse would close on September 8, 2018.

[2][28] On August 30, 2018, instead of being demolished or relocated, it was announced that Apocalypse would be converted into a floorless coaster and renamed Firebird for the 2019 season.

[31] After departing the station, the train makes a 180 degree turn leading to the 100-foot (30 m) chain lift hill.

Once at the top, the train goes through a pre-drop before making a sharp left hand turn leading into the first drop.

[32][33] One cycle lasts about 2 minutes with riders reaching a top speed of 55 miles per hour (89 km/h).

After the ride was relocated to Six Flags America, the wolf was removed and the word "Apocalypse" replaced it.