La Ronde (lit. 'The Round') is an amusement park in Montreal, Quebec, Canada. It was originally built as the entertainment complex for Expo 67, the 1967 world's fair. Today, it is operated by Six Flags Entertainment Corporation, under an emphyteutic lease with the City of Montreal until 2065. In-addition to being the Six Flags chain's northernmost location, La Ronde is the largest amusement park in Quebec and the second-largest in Canada (behind Canada's Wonderland, which became a sister in 2024 after Six Flags merged with Cedar Fair).

La Ronde occupies 59 hectares (146 acres) of the northern tip of Saint Helen's Island, situated on a man-made extension to the landmass; the park is in the vicinity of where the smaller, adjacent Ronde Island had once been (the origin of the park's name). The park hosts the annual Montreal Fireworks Festival, an international fireworks competition. Prior to Cedar Fair's merger with Six Flags, La Ronde was one of only two Six Flags properties, along with Frontier City in Oklahoma City, Oklahoma, that were not officially branded as Six Flags parks.

The Montreal region park is located within the St. Lawrence River on Saint Helen's Island, situated atop a man-made extension on its northern tip where the small (water-enclosed) Ronde Island had once been. The former granite Ronde island, which the extension was made around, was destroyed by blasting and the resulting crater it left turned into Dolphin lake, which the park surrounds. South of the amusement park is Jean-Drapeau Park, an urban park and former grounds of Expo 67, as well as the Jean-Drapeau Metro station and Montreal Biosphere museum.

Access to the park from Montreal and the South Shore is primarily served by the Jacques Cartier Bridge, or alternatively through Cité du Havre via the Concordia bridge at the island's opposite end. Public transit provides accessibility by means of the island's Metro station with seasonal shuttle bus service to the park.

The amusement park opens to the public from mid-May to late October (with peak season in July). La Ronde closes for the season in the last weekend of October.

In 1967, La Ronde was built as the entertainment complex for Expo 67, the world fair held in Montreal from April 28 to October 29, 1967. The exposition was located on 400 hectares (990 acres) of man-made islands in the St Lawrence River adjacent to Montreal, and comprised six "theme" pavilions, 48 national pavilions, four provincial pavilions, 27 private-industry and institutional pavilions, and La Ronde – a 54 ha (130 acres) entertainment complex with theatres, midway attractions, drinking and dining. The rides, restaurants and beer halls of La Ronde remained open until 2:30 a.m. nightly, after the rest of the Expo site closed down at 10:30 p.m. After Expo 67 World's Fair, the City of Montreal continued to run the amusement park for the next 34 years.

In 1973, on July 8, the drowning deaths of two police officers occurred at La Ronde's Dolphin Lake, after the officers attempted to aid an intoxicated woman who had fallen into the water that night.

In 1973, in October, the rapid transit train system that served La Ronde, the Expo Express, permanently closed. Its terminus station sat right above La Ronde's main entrance, and brought off-island visitors directly to the park during Expo 67 and the early days of Man and His World. Although the transit system has long since been demolished, La Ronde's main entrance is built around the former train station, and an (abandoned) train bridge still sits in the St Lawrence river to the east of the park.

In 1979, on July 8, the drowning deaths of three people occurred at La Ronde's Dolphin Lake when "The Mississippi" tour boat, ferrying up to 60 passengers, capsized. Two weeks later, on July 22, a fourth drowning death occurred when a man attempted a swim across Dolphin Lake at late-night, after the park had closed.

In 1980, blue-collar workers at La Ronde's Alcan Aquarium enacted a 41-day strike, refusing to enter the aquarium to feed or care for its dolphins. Abandoned by their trainers, and left to starve in isolation, 3 dolphins died as a result of the neglect. Never recovering from the negativity surrounding the tragic event, the aquarium permanently closed in 1991.

In 1992, the amusement park was used as a backdrop in the Are You Afraid of the Dark? episode "Laughing in the Dark" (season 1, episode 2) and was given the fictional name "Playland". The episode featured the park's giant roller coaster, haunted house with a dragon on the front and its old-fashioned carousel.

In 2001, the City of Montreal sold La Ronde to Six Flags, an American theme park chain, in a deal completed on May 4, 2001. It acquired all of the assets of the park for $20 million USD and has a long-term contract to lease the land from the city. Before the announcement of the Six Flags purchase, the city had considered offers from other bidders including Paramount Parks, Cedar Fair, and Parc Astérix. Since then, Six Flags has invested around $90 million in new rides and improvements, such as Le Vampire, Splash, Le Goliath and Ednör – L'Attaque as well as a new main entrance.

In 2007, La Ronde celebrated its 40th anniversary with Expo 67 themed events commemorating the world fair.

In 2012, a man was struck and killed by "The Vampire" roller-coaster after entering a restricted zone while the ride was operating.

In 2020, after a three-month delay due to the COVID-19 pandemic, La Ronde opened belatedly for its 54th operating season. It closed early for the season too due to the ongoing pandemic. Only a limited number of rides were open during its unprecedented two-month season that only ran from August 3 to October 3, 2020.

La Ronde holds a number of attractions including live shows and amusement rides. As of 2020, the amusement park had 39 amusement rides including eight roller coasters. One of the park's roller coasters, Le Monstre, a 40-metre (131 ft) holds the record for highest double-tracked roller coaster in the world. During the month of October, the park hosts an annual Fright Fest to celebrate Halloween. The festival has four haunted houses, and many costumed performers who walk around the park. Park admission is free for toddlers under the age of two, accompanied by an adult.

Name	Ride manufacturer	Year opened	Type or model	Thrill level	Ref(s)
Boomerang	Vekoma	1984	Shuttle roller coaster	Maximum
Dragon	Intamin	1994	Indoor roller coaster	Moderate
Ednör – L'Attaque	Vekoma	2010	Suspended Looping Coaster	Maximum
Goliath	Bolliger & Mabillard	2006	Out and back roller coaster	Maximum
Monstre, Le	William Cobb & Associates	1985	Dual-tracked wooden roller coaster	Maximum
Toboggan Nordique	Zamperla	2003	Wild Mouse roller coaster	Moderate
Vampire, Le	Bolliger & Mabillard	2002	Inverted roller coaster	Maximum

Name	Ride manufacturer	Year opened	Type or model	Thrill level	Ref(s)
Aqua Twist	Mack Rides	2013	Twist 'n' Splash teacups	Moderate
Autos Tamponneuses	RDC Bumper Cars	2003	Bumper cars	Moderate
Bateau Pirate	HUSS Park Attractions	1988	Pirate ship	Maximum
Catapulte	Ride Entertainment Group	2008	Skycoaster	Maximum
Chaos	Larson International	2019	Fire Ball	Maximum
Condor	HUSS Park Attractions	1990	Condor	Moderate
Disco Ronde	HUSS Park Attractions	1986	Breakdance	Moderate
Démon	Mondial	2014	Top Spin	Maximum
Grande Roue	Vekoma	1984	Ferris wheel	Moderate
Manitou	Zamperla	2003	Nitro	Maximum
Orbite	S&S – Sansei Technologies	1999	Space Shot	Maximum
Sling Shot		2002	Reverse Bungee	Maximum
Splash	Intamin	2004	Log flume	Moderate
Titan	Zamperla	2017	Giant Discovery frisbee	Maximum
Tour de Ville	Zamperla	2003	Swing ride	Moderate
Tourbillon	Larson International	2018	Tilt-A-Whirl	Moderate
Vertigo	Zamperla	2003	Ranger	Maximum
Vol Ultime	Funtime	2012	Swing ride	Maximum

Name	Ride manufacturer	Year opened	Type or model	Thrill level	Ref(s)
Air Papillon	Zamperla	2005	Crazy bus	Mild
Danse des Bestioles, La	Zamperla	2005	Junior jets	Mild
Grande Envolée, La	Zamperla	1990	Balloon Race	Moderate
Explorateurs, Les	Arrow Dynamics	1967	Rub-A-Dub ride	Mild
Marais Enchanté	Zamperla	2005	Rockin' Tug	Mild
Marche du Mille-pattes	Arrow Dynamics	1967	Kiddie Coaster	Mild
Monsieur L'Arbre	Zamperla	2005	Swing ride	Mild
Ourson Fripon	Zamperla	2005	Kiddie drop tower	Mild
Phoenix	Larson International	2016	Flying Scooters	Moderate
Pommes d'Api	Zamperla	2005	Ballon tower	Mild
Safari, Le	Arrow Dynamics	1967	Train ride	Mild

In May 2002, La Ronde announced the installation of a Bolliger & Mabillard inverted roller coaster called Le Vampire, which was the first major investment by Six Flags. It is a mirror image of the "Batman – The Ride" roller coasters found at many other Six Flags parks.

In 2003, La Ronde opened six new rides including Auto Tamponneuses, Tour de Ville, Manitou, Vertigo, Grand Carrousel, and Toboggan Nordique. Some existing rides were replaced by these new rides.

In 2004, La Ronde opened Le splash (a Shoot the Chute ride) and SpongeBob 3D.

In May 2006, La Ronde opened its ninth roller coaster, Goliath, a 53-metre (174 ft) high Bolliger & Mabillard mega coaster. It reaches speeds of 110 km/h (68 mph), making it the fourth tallest and the fourth fastest roller coaster in Canada.

In 2006, La Ronde permanently closed the Nintendo Megadome, housed in the former Alcan Aquarium building since 1995. It was a Nintendo-sponsored video game centre with the (then) latest Nintendo video games and attractions. Filling the gap, in 2009 the former 3D theatre housed Nintendo DS and Wii consoles, advertisements and had a Nintendo Store. This attraction too was permanently phased out a few years later.

For the 2007 season, La Ronde painted its observation tower bright orange to advertise Pizza Pizza, an Ontario pizza chain that was emerging into the Quebec market at the time. All of the pizza stands inside the park were renamed from Pizza Ronde to Pizza Pizza.

In January 2009, La Ronde announced its intention to become a Six Flags branded park, using the rights to Warner Bros. (Looney Tunes) and DC Comics trademarks under the licensing agreement with Six Flags. Le Vampire, a mirror image of Batman: The Ride constructed in 2002, carries no association to the Batman media franchise because the licence with Warner Bros. and DC Comics is not valid in unbranded Six Flags parks. It is not yet known whether Le Vampire will be re-branded to Batman: The Ride once the branding of the park commences.

The Serial Thriller, a Vekoma Suspended Looping Coaster that used to be located at the now defunct Six Flags AstroWorld, was shipped to La Ronde from the Great Escape, another Six Flags property where it had laid in storage since 2005. The roller coaster, which opened in 1999 at Six Flags AstroWorld, was installed over the Lac des Dauphins at the park for the 2010 season and is named Ednör – L'Attaque. It features special effects and is themed around an alleged sea monster that was purported to have appeared in the Lac des Dauphins.

On March 9, 2010, La Ronde announced that Terminator X: A Laser Battle for Salvation, an interactive laser-tag attraction themed around the Terminator series, would also be featured in the park for the 2010 season.

On January 19, 2012, Six Flags announced Vol Ultime at La Ronde; it is similar to the SkyScreamers and it is 45-metre (148 ft) tall.

In 2013, the park opened a water-themed attraction, Aqua Twist. On August 29, 2013, Six Flags announced the addition of Demon, a top spin ride, for the 2014 season. As a world premiere, Goliath was the first roller coaster equipped and exploited with a virtual reality headset.

On August 28, 2014, Six Flags announced Maison Rouge, a haunted house, for the 2015 season.

On September 3, 2015, Six Flags announced Avenue Aventure, a section of the park which includes Bateau Pirate, Condor and two new rides: Phoenix, a Larson flying scooters, and Gravitor, a Chance Falling Star from Six Flags St. Louis.

On September 1, 2016, Six Flags announced Titan, a Zamperla Giant Discovery. It is the park's second pendulum ride. It is identical to the Riddler Revenge at Six Flags Over Texas.

In 2017, Le Monstre had only one track open for mainly the whole season while the other track was retracked.

In May 2017, on its 50th anniversary, La Ronde announced the permanent closure of one of its original rides, La Pitoune. The water log ride dated back to Expo 67, and had its final season in operation in 2016. It has since been dismantled.

On Saturday, May 19, 2018, Six Flags La Ronde opened a platform thrill ride called Le Tourbillon, a Larson International GX5 model (Waltzer-style) Tilt-A-Whirl, residing along L'Avenue across from the Phoenix. This addition was supposed to have been amongst the proposed featured rides for a new family section, called Carnaval En Folie (the newly added ride was due to be named La Torsade).

On May 18, 2019, La Ronde debuted a new ride called Chaos, a Fire Ball ride by Larson International previously known as El Diablo when it was located at Six Flags Great Adventure from 2015 to 2018. After being relocated to La Ronde, its red color was changed to black, and it received new trains. Chaos is located on the former site of Le Moulin de la Sorcière between the rides Manitou and Boomerang.

On August 25, 2019, Super Manège closed. In August 2019, Six Flags announced that Vipère, formerly Green Lantern: First Flight at Six Flags Magic Mountain, would debut in 2020. The project was delayed several times and ultimately cancelled in 2022.

In November 2022, La Ronde began the demolition and removal of the Minirail, another original ride dating back to Expo 67. It had been out of service since 2019, and was the last vestige of the monorail system that ran three separate circuits, with one on Notre-Dame Island and two on opposite ends of Saint Helen's Island.

In May 2023, La Ronde silently retired its Galopant carousel (built in 1885) when it was removed from its official park map and list of rides. Its final season of operation was 2019 (its 19th century music organ stopped working two decades earlier). The carousel has been at La Ronde since Expo 67, but heritage groups are concerned as its upkeep and maintenance have been abandoned and its now in a deteriorating state.

A number of attractions and amusement rides have been installed and later removed from the park. They include:

Name	Manufacturer	Installation Year	Closed	Replaced by
Sprung Schanze	Mack	1967	1969
Voyage a la Lune	Schwarzkopf	1967	1968
Hofbrauhaus (Fun House)	Schwarzkopf	1967	1970
Parasols, Les	Schwarzkopf	1967	1971
Flitzer		1967	1974
Bobsled	Schwarzkopf	1967	1980
Parachutes, Les		1967	1980
Gyrotron	Von Roll	1967	1977	Le Monstre
Scooter	Schwarzkopf	1967	1982
Calypso		1967	1982
Carroussel (Car Carousel)	Hennecke	1967	1983
Trabant	Chance Rides	1967	1981
Turbo		1967	1979	Boomerang
Spider		1967	1984	Maelstrom
Grande Roue		1967	1983	Condor
Alcan Aquarium		1967	1991	Nintendo Megadome
Sky Ride / Le Téléférique	Von Roll	1967	1996	Dragon
Mont Blanc	Reverchon	1967	2000
Bagnoles, Les (Antique Cars)	Arrow	1967	2004	Air Papillon
Pitoune, La	Arrow Dynamics	1967	2017
Spirale	Von Roll Holding	1967	2018
Minirail	Maschinen, Fabeiv	1967	2019
Galopant, Le	Bairolle	1967	2019
Montagnes Russes, Les	Schwarzkopf	1968	1984	Le Monstre
Super Himalaya	Mack	1968	1985
Flight to Mars	Schwarzkopf	1969	1970
Matterhorn	Mack	1969	1974
Bousclade, La	Eli-Bridge	1969	1976
Petites Avions	Herschell	1969	1990
Moulin de la Sorcière, Le	Pinfari	1969	2004	Chaos
Astronet	Hampton	1970	1983
Mini Patrouille	Hampton	1970	1983
Saut, Le	Mack	1971	1971
Tornade, La	Watkins	1971	1973
Brasserie du Rire (Fun House)		1971	1974
Saturne VI	Portable-Rides-Inc.	1972	1973
Course, La	Zierer	1972	1976
Tourbillon, Le	Hrubetz	1972	1983
Rotor, Le	Chance Rides	1972	1987	Astronef
Zipper	Chance Rides	1970	1980
Tilt-a-Whirl	Sellner	1974	1978
Disco Dome	Eli-Bridge	1977	1984
Cinema 180		1978	1984
Salem Aleikium (Fun House)		1978	1985	Le Monstre
Mont Blanc, Le	Reverchon	1978	2000
Troika / Diablo	HUSS Maschinenfabrik	1978	2003	Le Splash
Super Manège	Vekoma Rides	1981	2019
Entreprise	HUSS Maschinenfabrik	1982	1988
Arc en ciel	HUSS Maschinenfabrik	1983	1987	Bateau pirate
Autos Tamponneuses, Les	Reverchon	1983	2002	Le Toboggan Nordique
Carrousel Volant	Zierer	1983
Astrobolides, Les	Sartori	1984	2004	Le Marais Enchanté
Petite Roue, La	Sartori	1984	2004	Pommes D'api
Chat et la Souris, Le	Sartori	1984	2004	La Danse des Bestioles
Astronef (Sky Flyer)	Vekoma	1985	2002	Le Manitou
Palais des Glaces, Le		1985	2003	Le Splash
Twister, Le	Heintz Fahtze	1985	2008	Phoenix
Maëlstrom	Mack	1985	2008	Zone du bonhier Coca-Cola
Aqua-parc		1985	1992	Vampire
Tapis Volant, Le	Zierer	1986	2002	Les Autos Tamponneuses
OVNI	HUSS Maschinenfabrik	1986	2006	Démon
Mini Rallye	Sartori	1993	2004	Monsieur l'Arbre
Hydroid '94 (Sub-Oceanic Shuttle)	Iwerks	1994	1995	Volcanozor (Dino Island II)
Volcanozor (Dino Island II)	Iwerks	1995	2004	SpongeBob 3D
Nintendo Megadome		1995	2006
Cobra	Intamin	1995	2016
Tornade, La	HUSS Maschinenfabrik	1997	2010
Rock Wall		2001	2010	Aqua Twist
Eurobungy		2002	2011	Gravitor
Tasses Magiques	Zamperla	2003	2009	Ednör – L'Attaque
SpongeBob 3D	Iwerks	2004	2007	Experience Nintendo
Experience Nintendo (Cyberzone)	Ubisoft, Nintendo	2008	2011	Season pass processing center
The Mummy: Tomb of the Dragon Emperor	Sudden Impact! Entertainment Company (SIEC)	2009	2009	Terminator X: A Laser Battle for Salvation
Terminator X: A Laser Battle for Salvation	Sudden Impact! Entertainment Company (SIEC)	2010	2010
Maison Rouge (Haunted House)	ACME-Services-Sceniques	2015	2017
Gravitor	Chance Rides	2016	2023
Grand Carrousel	Chance Morgan	2003	2024	Carousel

• Belmont Park, Montreal
• Dominion Park
• Incidents at Six Flags parks

• La Ronde official English website
• La Ronde at the Roller Coaster DataBase
• Expo 67 – La Ronde