Action Park & New Jersey's Backyard

 is an amusement and water park located in Vernon, New Jersey, United States, on the grounds of the ski resort. It originally opened in 1978 and then rebranded as Mountain Creek Waterpark in 1998. It rebranded back to Action Park for 2014 and was bought by Carwardine Parks in 2016, who added the New Jersey's Backyard theme park to the property.

Water rides

 * Cannonball Loop 2.0 (A ProSlide Double SuperLoop, formerly H2-Oh-No!)
 * F1 (ProSlide Twister)
 * F2 (ProSlide Twister)
 * F3 (Dive-In Slide)
 * F4 (ProSlide FreeFall)
 * Kiddie Korner (Kids play area, combines 3 older attractions)
 * Level 1 (ProSlide Pipeline)
 * Level 2 (ProSlide Dark Pipeline with Theme Choice)
 * Level 3 (ProSlide TurboPipeline)
 * Level 4 (ProSlide TurboPipeline)
 * Level 5 (Tube Slide)
 * Level 6 (Tube Slide, considered one of the first bowl slides ever made)
 * Lost Island River (Lazy River)
 * Mammoth (Rafting Slide)
 * Mini-Tarzan Jump
 * Racer (Mat Racing Slide)
 * Tarzan Jump
 * Tarzan Pool
 * Tornado (A ProSlide Tornado, formerly High Anxiety)
 * Wave Pool

Roller coasters

 * Alpine Coaster (2014; Originally Part of Action Park 2.0)
 * Daring Drop (2017; A B&M Dive Coaster)
 * Mine Ride (2021; An SBF Mine Train, relocated from Wonderland Eurasia)
 * Redwall: The Ride (2017; A Zamperla Volare roller coaster, relocated from Opryland)
 * Sagwa's Rickshaw Run (2017; a Vekoma Suspended Family Coaster with two inversions, much of the layout barring the lift hill is in the style of it's Schwarzkopf "cousins" at Omaha Luna Park and Alabama's Backyard)

Flat rides

 * Caterpillar (2017; a Huss-TechEruo Caterpillar ride)
 * Mighty Morphin Power Rangers 4D: The Greatest Fights (2017; A Sally dark ride with 4D technology)
 * Screamin' Swing (2017)

Kiddie Rides

 * Grand Prix (2017; A Zamperla Speedway ride)
 * Roto-Round (2017; A Huss-TechEruo Junior Roto-Round ride)
 * Up Up and Ahoy! (2017; A Zamperla Crazy Bus ride themed to a pirate ship)

Trivia

 * This park heavily advertises itself as "The World's Most Infamous Park", and anyone who produces an Action Park documentary on YouTube with at least 10,000 views automatically gets listed on the website.