Kingda Ka: Height, Speed, Closure & What’s Replacing It

For nearly two decades, Kingda Ka was the undisputed king of roller coasters — the tallest machine of its kind anywhere on Earth, and for years the fastest too. Riders who braved the 456-foot Six Flags Great Adventure icon never forgot the jolt of a hydraulic launch firing them from a dead stop to 128 mph in about 3.5 seconds.

But nothing in the coaster world stays on top forever. Six Flags shut Kingda Ka down for good in November 2024, imploded its tower a few months later, and is now raising a very different ride on the same footprint. Here’s how Kingda Ka worked, why it closed, and what’s rising from its site at Six Flags Great Adventure today.

Quick Answer

Kingda Ka was a 456-foot hydraulic-launch coaster at Six Flags Great Adventure in Jackson, New Jersey, that blasted riders to 128 mph in roughly 3.5 seconds. It was the world’s tallest roller coaster from its May 2005 opening until Six Flags permanently closed it on November 14, 2024. Its tower was demolished in a February 28, 2025 implosion, and the site is being rebuilt for Bakunawa, a spinning launch coaster set to open in 2027.

Height, Speed & How the Hydraulic Launch Worked

Kingda Ka’s signature moment came before riders even left the station area: a hydraulic launch system, built by Intamin and engineered by Werner Stengel, used a cable-and-catch-car mechanism to sling the train from 0 to 128 mph in about 3.5 seconds — acceleration comparable to a jet fighter’s takeoff roll. There was no slow chain lift and no anticipation climb; the launch itself was the ride’s first and most violent thrill.

From there, the train shot straight up a 456-foot “top hat” tower, twisted through a 90-degree spiral near the summit, and plunged back down a 418-foot near-vertical drop. With zero inversions and 3,118 feet of track, Kingda Ka wasn’t about a long circuit — the entire experience lasted roughly 28 seconds, relying purely on height, raw speed, and a burst of airtime on the return stretch. Riders were secured with over-the-shoulder restraints rather than simple lap bars, standard for a launch coaster reaching triple-digit speeds.

A Record-Breaking Legacy

When it opened on May 21, 2005, Kingda Ka dethroned its own sister ride, Top Thrill Dragster at Cedar Point, to become both the world’s tallest and fastest roller coaster. It held the speed record until 2010, when Ferrari World Abu Dhabi’s Formula Rossa topped it at roughly 149 mph.

Height was a different story: Kingda Ka remained the tallest roller coaster on the planet for its entire operating life. No coaster anywhere surpassed 456 feet while Kingda Ka was still running. That streak only ended after its 2024 closure — Falcon’s Flight, a roughly 640-foot coaster at Six Flags Qiddiya City in Saudi Arabia, opened afterward and now holds the world height record.

Kingda Ka vs. Top Thrill Dragster: How the Sister Rides Compared

Kingda Ka and Top Thrill Dragster shared the same designer (Werner Stengel) and the same Intamin hydraulic launch technology, which is why fans often paired them. Top Thrill Dragster opened first, in 2003 at Cedar Point, standing 420 feet tall with a 120 mph launch and simple lap-bar restraints. Kingda Ka topped it in 2005 with a taller 456-foot tower, a faster 128 mph launch, an added 90-degree twist near the summit, and over-the-shoulder restraints.

The two rides’ fates eventually diverged. Top Thrill Dragster’s original single hydraulic launch also proved troublesome over the years and was ultimately rebuilt from the ground up: Cedar Point reopened it in 2024 as Top Thrill 2, keeping the 420-foot spike but swapping in a more reliable triple linear synchronous motor (LSM) launch. Kingda Ka’s site at Great Adventure, by contrast, is getting a completely new ride rather than a retrofit of the old structure.

Why Six Flags Closed Kingda Ka in 2024

Kingda Ka ran its last public rides on November 10, 2024, and Six Flags confirmed the permanent closure four days later, on November 14, 2024. Park president Brian Bacica said the decision was part of the park’s broader push toward newer, more reliable attractions rather than the result of any single incident.

Hydraulic launch systems like Kingda Ka’s are notoriously demanding to maintain as they age — sensitive to weather, prone to sensor and hydraulic-pressure faults, and increasingly costly to keep running after nearly 20 years of daily use. That same wear-and-tear pattern is part of why Cedar Point ultimately rebuilt Top Thrill Dragster’s launch system rather than continuing to run the original hydraulics indefinitely. Zumanjaro: Drop of Doom, the drop tower Six Flags had built onto Kingda Ka’s support structure in 2014, closed on the very same day.

Demolition and What’s Replacing Kingda Ka

On February 28, 2025, Six Flags imploded both the Kingda Ka and Zumanjaro towers in a single controlled demolition, clearing the site for a new attraction. Six Flags spent months teasing the project under the codename “Project Purple” before officially unveiling it on July 28, 2026.

The new ride is Bakunawa — the world’s tallest and fastest spinning launch coaster, named for the legendary sea serpent of Philippine mythology. Standing roughly 382 feet tall, it’s designed to set multiple world records for spinning coasters and anchor a reimagined Boardwalk area at Six Flags Great Adventure when it opens in 2027.

Visiting Six Flags Great Adventure Today

Kingda Ka and Zumanjaro are gone, but Six Flags Great Adventure remains a full-scale coaster park while Bakunawa is under construction, with the rest of its lineup — including record-holders like El Toro and Nitro — still operating. Because operating hours shift seasonally and ticket pricing runs on tiered, date-based options (single-day, season passes, and Gold/Diamond memberships), exact figures change throughout the year.

For current hours, ticket prices, and construction updates on Bakunawa, check the official Six Flags Great Adventure site before you plan a visit.

Kingda Ka FAQs

Is Kingda Ka still open?

No. Six Flags Great Adventure ran its last public rides on November 10, 2024, confirmed the permanent closure on November 14, 2024, and demolished the ride’s tower in a February 28, 2025 implosion.

How fast did Kingda Ka go?

Kingda Ka’s hydraulic launch system accelerated riders from a standstill to a top speed of 128 mph in about 3.5 seconds.

Was Kingda Ka the tallest roller coaster ever built?

At 456 feet, Kingda Ka was the world’s tallest roller coaster for its entire 2005–2024 operating life. It has since been surpassed by Falcon’s Flight, a roughly 640-foot coaster at Six Flags Qiddiya City in Saudi Arabia.

Why did Kingda Ka close?

Six Flags cited the ride’s aging hydraulic launch technology and the rising cost and frequency of mechanical downtime after nearly 20 years of operation, as part of a broader push to replace older attractions with newer, more reliable rides.

What is replacing Kingda Ka at Six Flags Great Adventure?

Bakunawa, a spinning launch coaster themed to Philippine sea-serpent mythology, is being built on Kingda Ka’s former site. Standing about 382 feet tall, it’s designed to break multiple world records for spinning coasters and is set to open in 2027.

Is Zumanjaro: Drop of Doom, the drop tower next to Kingda Ka, still open?

No. Zumanjaro was built onto Kingda Ka’s support structure in 2014 and closed the same day as Kingda Ka, November 14, 2024. Its tower was imploded alongside Kingda Ka’s on February 28, 2025.

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