Action Park was an amusement and water park located in Vernon Township, New Jersey, United States, on the grounds of the Vernon Valley/Great Gorge ski resort. The park consisted primarily of water-based attractions and originally opened to the public in 1978, under the ownership of Great American Recreation (GAR).
Action Park featured three separate attraction areas: the Alpine Center, Motorworld, and Waterworld. The last was one of the first modern American water parks. Many of its attractions were unique, attracting thrill-seekers from across the New York metropolitan area. While extremely popular, Action Park had a reputation for poorly designed rides, undertrained and underaged staff, intoxicated guests and staff, and a consequently poor safety record. At least six people are known to have died as a result of mishaps on rides at the park. Healthcare workers and local residents had nicknamed the place "Traction Park", "Accident Park", "Class Action Park" and "Friction Park".Little effort was made by state regulators to address those issues, despite the park's history of repeat violations. GAR's management resorted to illegal financial schemes to keep itself solvent, which led to indictments of its executives, some of whom, like founder Gene Mulvihill, pled guilty to some charges. In its later years, personal injury lawsuits led to the closure of increasing numbers of rides and eventually the entire park closed in 1996.
In 1998, resort developer Intrawest announced the purchase of the majority of the Vernon Valley/Great Gorge ski area, including Action Park and other developable real estate lands that GAR owned. The park received a massive overhaul, which included extensively renovating and repairing attractions, especially those deemed either outright unsafe or inappropriate relative to Intrawest's vision of the park, with some being removed entirely. Afterward, the park reopened under a different name.