Welcoming groups from 50-1000 people, Riverplex at Sandcastle provides a complete summer party or picnic solution for family reunions, corporate events, civic groups, churches, professional organizations and more. Surprisingly affordable and easy to plan, Riverplex at Sandcastle offers everything from food and beverage planning to games and entertainment, all in a picturesque, easy-to-reach riverfront location adjacent to Sandcastle Waterpark.