When does the water park close for the year

Labor day weekend.

Labor day

The water park part is closed but the entire park doesn't close until mid January I believe

To my grand daughter's regret, it's already closed. You can enjoy Monster Trucks in that space.

Yes

Closed after Labor Day. The Monster Trucks are setup in the Waterpark area right now.

We were there today (Sept 25) and it was closed

Already closed

Labor Day was the last day