Raging Waters San Jose was founded in 1985 and is Northern California's Largest Waterpark, offering scenic panoramic views of Lake Cunningham and the San Jose Foothills, over a million gallons of San Jose water slides, rides, and attractions, and 23-acres of family-friendly fun!Top-rated family attractions include the 350,000-gallon Wave Pool, Endless River, and Family Raft Ride. Our many special events, great family dining options, and endless summer fun make Raging Waters one of the best water parks in San Jose, CA.