You can get a day pass for $10.00. Call first. I believe the pool opens at 1PM, but it is spring break so pool may be open sooner.
Seniors can also visit The Summit. They also have a great pool! More info here: https://grandfungp.com/
It varies from "The Epic" and "Epic Waters". Most all of that information can be found by calling or visiting the websites of both "The Epic" and "Epic Waters". Epic Waters is the Indoor Waterpark, and while the Epic does have a pool it is more recreation oriented.
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