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The Flash: Vertical Velocity
Steel Impulse at Six Flags Discovery Kingdom, Vallejo, California. Opened 2001.
- Height
- 150 ft
- Drop
- n/a
- Top speed
- 60 mph
- Length
- 630 ft
- Inversions
- 1
- Ride time
- n/a
- Designer
- Intamin
The Flash: Vertical Velocity is a steel inverted shuttle roller coaster in the DC Universe area of Six Flags Discovery Kingdom in Vallejo, California. It is an Intamin Impulse Coaster (Twist & Spike model) and opened on June 8, 2001 as Vertical Velocity.
Linear induction motors launch the train forward out of the station, through a twisted section and up a tower; it rolls back and is launched again, running the 630-foot track in both directions. The park gives a top speed of 60 mph and a height of 150 feet. RCDB counts one inversion.
The ride was altered before the 2002 season to stay within a 150-foot height limit set by the city: the forward tower was changed to an inclined tower and the rear tower was shortened. It later took The Flash name, stood unused from January 2024, and reopened on July 27, 2025.
Sources
- sixflags.com/discoverykingdom/attractions/vertical-velocity (Park page: THE FLASH Vertical Velocity, suspended coaster in DC Universe; launches forward and backward, up to 60 mph, elevation 150 ft, 180-degree twisted drop, zero-g roll, vertical tower; introduced 2001; manufacturer Intamin; 54 in. minimum, 75 in. maximum height.)
- rcdb.com/1143.htm (RCDB: Flash: Vertical Velocity at Six Flags Discovery Kingdom, operating since 2001-06-08; Intamin Impulse Coaster / Twist & Spike (56m); length 630 ft, height 150 ft, 65 mph, 1 inversion; LIM launch; former name Vertical Velocity (2001 to 2018); SBNO 2024-01 to 2025-07-27; modified for 2002 to meet the city's 150-ft limit (forward tower inclined, rear tower shortened).)
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.