Twilight Zone accident

Castaic Creek (Chumash: Kaštiq) is a 25.0-mile-long (40.2 km) stream in the Sierra Pelona Mountains, in northeastern Los Angeles County, California. It is a tributary of the Santa Clara River.

Indian Dunes was a 600-acre (2.4 km2) film ranch owned by Newhall Land & Farming Company. Located near the Six Flags Magic Mountain amusement park in Valencia, California, United States, it was a favorite of filmmakers for its versatility and location within the thirty-mile zone until its owners returned the site to farming in 1990 following a reduced interest in the kind of action television programs and films that had been produced there. The company reportedly grossed up to $600,000 in 1990 ($1.3 million in 2021 dollars).

Del Valle is an unincorporated community in Los Angeles County, California, United States.

Rancho San Francisco was a land grant in present-day northwestern Los Angeles County and eastern Ventura County, California. It was a grant of 48,612 acres (19,673 ha) by Governor Juan B. Alvarado to Antonio del Valle, a Mexican army officer, in recognition for his service to Alta California. It is not related to the city of San Francisco. The rancho is the location of the first popularly known finding of gold in the Southern California area in 1842, in Placerita Canyon. Much of the present day city of Santa Clarita lies within the boundary of what was Rancho San Francisco. The adobe headquarters of the rancho, and the site of the gold find (known today as the "Oak of the Golden Dream"), are designated California Historical Landmarks. The rancho included portions of the San Gabriel, Santa Susana, Topatopa, and Sierra Pelona Mountain ranges.

Psyclone was a wooden roller coaster located at Six Flags Magic Mountain in Santa Clarita, California. Designed by Curtis D. Summers and constructed by the Dinn Corporation, the roller coaster opened to the public on March 23, 1991. Psyclone's design was modeled after the well-known Coney Island Cyclone roller coaster, a historical landmark located at Coney Island in New York City. It featured eleven hills, five high-speed banked turns, and a 183-foot-long (56 m) dark tunnel. Bolliger & Mabillard, a company that builds steel roller coasters, manufactured the trains for Psyclone.

The Riddler's Revenge is a stand-up roller coaster located at Six Flags Magic Mountain. Manufactured by Bolliger & Mabillard, the ride opened as the park's eleventh roller coaster on April 4, 1998, setting multiple world records among stand-up coasters. Originally located in the Movie District section of the park, which later became Metropolis in 2017, The Riddler's Revenge was also the park's single biggest investment at a cost of $14 million. It features a height of 156 feet (48 m), a maximum speed of 65 mph (105 km/h), six inversions, and a track length of 4,370 feet (1,330 m).

Valencia is an unincorporated community in northwestern Los Angeles County, California. This area, with major commercial and industrial parks, straddles State Route 126 and the Santa Clara River. Development projects continue to be built in the unincorporated area. A major expansion of Valencia is under construction with new residential neighborhoods and the expansion of commerce and industrial developments. Spanning the Santa Clara River, the massive Newhall Ranch development was conceived by the Newhall Land land management company in the 1980s. After lengthy delays due to environmental challenges and change of investors, the project broke ground in 2017 and was renamed FivePoint-Valencia. The new development is directly west of Six Flags Magic Mountain.

Apocalypse: The Ride, formerly known as Terminator Salvation: The Ride, is a wooden roller coaster located at Six Flags Magic Mountain in Valencia, California. Manufactured by Great Coasters International, the roller coaster opened to the public on May 23, 2009. It is located in The Underground section of the amusement park on a plot of land formerly occupied by the Psyclone (1991-2007), Shockwave (1986-1988) and Sarajevo Bobsleds (1984-1986). It was the first wooden coaster to feature onboard audio, and its Terminator theme was short-lived following a corporate restructuring by Six Flags in 2011.

Castaic Junction is an unincorporated community located in Los Angeles County, California. It is located at the crossroads of Interstate 5 and State Route 126 near the confluence of Castaic Creek and the Santa Clara River. Places in Castaic Junction carry a Valencia zip code, and it is adjacent to the City of Santa Clarita. Six Flags Magic Mountain theme park is just south of the intersection

West Coast Racers is a dueling steel roller coaster located at Six Flags Magic Mountain theme park in Valencia, California. Manufactured by Premier Rides, the ride is a collaboration between West Coast Customs and Six Flags that was promoted as the world's first launch version of a racing roller coaster. After multiple delays and missing the 2019 summer season, the ride eventually debuted on December 21, 2019, in a series of preview events spanning several weeks. It officially opened to the public on January 9, 2020. West Coast Racers is located in a newly-themed section of the park named The Underground, which replaced the former Cyclone Bay.

Ninja is an Arrow Dynamics steel suspended roller coaster located at Six Flags Magic Mountain in Valencia, California. It is the fastest roller coaster of its kind in the world, joint with Vortex at Canada's Wonderland, both with top speeds of 55 mph (89 km/h).

Superman: Escape from Krypton (originally known as Superman: The Escape) is a steel shuttle roller coaster located at Six Flags Magic Mountain in Valencia, California. When it opened in 1997, it was the tallest roller coaster in the world, and its speed of 100 mph (160 km/h) was tied for the fastest with Tower of Terror II, a similar roller coaster which opened two months earlier at Dreamworld in Australia. These two coasters were the first to utilize Linear Synchronous Motor (LSM) technology to propel vehicles to top speed. To date, it is the only reverse freefall coaster left in existence after the dismantling of Tower of Terror II. The intended opening date of 1996 was postponed because of several issues with the launch system. The ride was closed in late 2010 for refurbishment, and it emerged in 2011 as "Superman: Escape from Krypton". The refurbished ride featured new trains which face backward, speeds of up to 104 mph (167 km/h), and it was painted with a new color scheme. As of 2013, Superman: Escape from Krypton has the third-tallest structure, the fifth-fastest speed and the third-longest drop of any roller coaster in the world.