Currently closed until 2018. Apparently they are renovating the area, all stony kill area trails are closed due to safety issues.
This place was superb. I would recommend that you go on the weekend though, as that is when the divers go and they turn on the underwater lights.
Unfortunately, this place closes at 4pm, so if you are on a tight schedule, it can be hard to catch the exhibit. Needless to say, I was unfortunate.
Absolutely gorgeous area, with tonnes of trails suitable for all levels. Free parking, and if you don't have your own bike, they have bike rentals available too.