The Joker is a steel roller coaster at Six Flags Discovery Kingdom in Vallejo, California. The ride opened on May 29, 2016, as a rebuild of former wooden roller coaster Roar, adding a new steel track on top of Roar's wooden support structure. This hybrid configuration was implemented by Rocky Mountain Construction and is themed to the Joker, a comic book character villain featured in DC Comics publications. The original Roar roller coaster was constructed by Great Coasters International and opened in 1999.HistoryRoar was a roller coaster at Six Flags Discovery Kingdom constructed by Great Coasters International. When it debuted on May 14, 1999, Roar was the park's first wooden roller coaster and one of its first rides overall during the transition of adding amusement park rides to the marine mammal park. The coaster featured a height of, a first drop of and a top speed of 50mph.In July 2015, Six Flags announced that Roar at Discovery Kingdom would be closing on August 16, 2015. Several weeks later on September 3, 2015, plans were revealed to convert the ride into a steel-tracked coaster called The Joker for the 2016 season. The renovation would be performed by Rocky Mountain Construction using the company's patented I-Box steel track technology on all of the original wooden coaster supports. The roller coaster would also receive new trains themed to the Joker comic book character and would feature three inversions, including a new element marketed as a “step-up under-flip inverted roll”.
"Wood meets steel in this thrilling ride experience with THE JOKER, an exciting and utterly fun hybrid roller coaster. This state-of-the-art “must-ride” coaster marries the best of both classic and modern coaster designs for an unparalleled and unique experience. As the second DC-themed attraction at the park after SUPERMAN Ultimate Flight, THE JOKER’s villainous personality is evident in the coaster’s chaotic twists and turns, including the world’s first ever step-up under flip and the only breaking wave turn on the West Coast."
