California's largest waterpark is ranked #3 by the Travel Channel in its top list of US water parks. Raging Waters is located in San Dimas an hour east of Los Angeles and 30 minutes north of Orange County off Highway 57. This large 50-acre waterpark features 36 slides and attractions, plus a sand beach. Ragin' Racer, Raging Waters newest attraction is a multi-lane speed slide where you race against others. If you want to relax the Amazon River is a three quarters of a mile lazy river and the park has a large wave pool. Younger guests can play in Kids' Kingdom and Splash Island. Raging Waters is open seasonally from May into September. Be sure to call to verify operating hours before visiting.