Raging Rivers WaterPark
✓ Last confirmed for the 2026 season
Where: Raging Rivers WaterPark, Grafton, Illinois
When: seasonal (summer)
Hours: typically daylight hours
Cost: $38.99
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The Metro East's full-scale water park pairs wave pools and the Mississippi Monster tunnel slides with Itty Bitty Surf City for the smallest swimmers. Daily passes are $38.99 for guests over 42 inches tall, with kids under 2 free.